资源简介

(共45张PPT)
Period 3
Listening and Speaking
Sea exploration
Unit 3
Listen to the conversation on P30 and choose the best answer.
1.How many reasons are mentioned for whale research
A.One. B.Two. C.Three.
√
Ⅰ.选择填空(高考形式)
2.What do whales use sounds for
A.Singing and sharing.
B.Hunting and interacting.
C.Teaching and helping others.
√
3.Why do the campers take pictures of the whales’ fins
A.To distinguish them.
B.To give whales different names.
C.To send the pictures to other research groups.
√
Listen to the conversation on P30 again and fill in the blanks with the words you hear.
Craig：Here at the camp we are wild about whales! Today you have been helping us with our 1. .First of all，we asked you to find out some facts for a whale profile.What did you find，Sally
Sally：There are over 2. of whales.These include the blue whale，the largest known animal to have ever existed.They can grow to 100 feet long，and can weigh nearly 200 tons! There are two main types of whale: those 3. ，and those without.
Ⅱ.听力填空(精听训练)
whale research
80 different species
with teeth
Those without teeth eat very small organisms，whereas those with teeth eat fish and other larger sea animals.More than 70 species of whales have teeth.
Craig：Great! Then，we asked you to think about why we do whale research.Yes，Ben.
Ben：Firstly，it is 4. how many whales there are.Whales are threatened by many factors，including climate change，pollution，and hunting.Secondly，it is to track where whales go，so we can understand more about them，like their life cycle.Lastly，we know that whales are very 5. .They communicate and hunt using complex sounds，
to monitor
intelligent
and even sing and share songs.They can learn by themselves and can teach the things they have learnt to 6. .We want to understand more about this.
Craig：Very good，Ben.And lastly，we asked you to go out with us and write a report of the work we do.Can you give us your report，Luke
Luke：Yes.First，we followed a group of whales with the boat.Then we 7.____________ of their fins.Most whales have slightly different fins and marks，which can help us 8. .Meanwhile，we also noted their location，so we can track their movements and plot their migration path.
their young
took pictures
to tell them apart
Later，we created a database of their fins and locations.After that，we gave the group of whales a name，and each member a number.They will be added to the directory so we can 9. in the future.Finally，we 10. around the world to share the information with them.
Craig：Excellent! Thank you all for your help today.
identify them
contacted other whale research groups
作业3
A
Sea turtles(海龟) live life on the move.Adult sea turtles move repeatedly between feeding and breeding(繁殖) areas.So the question naturally arises：How do turtles guide their journeys across the vast water without landmarks？Thirty years of work with turtles has provided a framework for understanding those remarkable travels.
语篇解读　这是一篇说明文，主要讲了海龟是如何利用水流的运动以及太阳和地球的磁场在水下辨别方向的。
Ⅰ.主题语篇阅读
A sea turtle’s first migration seems a simple task：swimming toward the open ocean and away from land.Newly hatched sea turtles cannot see the direction of the open ocean.When entering the sea，they dive under the surface，use water motion caused by waves to determine the direction，and then swim directly toward open water.
Sea turtles can also keep a course in one direction using biological compasses based on the sun’s or the earth’s magnetic field(磁场).For young turtles，however，a compass alone isn’t enough to keep them safe. Fortunately，the earth’s magnetic field provides turtles with a map. Several magnetic features are geographically different so that every place has its own magnetic address，which allows sea turtles to sense their present magnetic addresses and set course for the magnetic addresses of their destinations.Sea turtles are born with the ability to recognize specific magnetic addresses in the ocean and to swim in directions that keep them safe.For example，Florida turtles don’t travel too far north into dangerous cold waters.
The amazing magnetic navigation(导航) of turtles is of importance. Conservationists need to make sure that turtles can recognize their birthplace and the feeding area in a natural magnetic environment. Animals programmed to migrate in the Atlantic Ocean are unlikely to navigate properly in the Pacific and vice versa.If researchers keep such needs in mind，it seems likely that the same skills that guided turtles for the last 120 million years will keep them on track for the next 120 million years.
1.Why is the question raised in the first paragraph
A.To make a prediction.
B.To come up with a solution.
C.To introduce the topic of the text.
D.To describe sea turtles’ life cycle.
√
推理判断题。第一段中“So the question naturally arises：How do turtles guide their journeys across the vast water without landmarks？”提出问题：海龟是如何在没有地标的情况下在广阔的水域中引导自己的旅程的？下文主要是围绕该问题展开，故第一段提出问题是为了引入本文的主题，故选C。
解析
2.What do we know about newborn sea turtles from paragraph 2
A.Their motion changes how waves are moving.
B.They can directly identify the ocean’s direction.
C.Their journey to the open ocean is quite simple.
D.They rely on sea waves to figure out the direction.
√
细节理解题。根据第二段中“Newly hatched sea turtles...use water motion caused by waves to determine the direction...”可知，刚孵出的海龟依靠海浪来确定方向，故选D。
解析
3.What does the word “map” underlined in paragraph 3 refer to
A.Approaches to escaping from enemies.
B.Potential dangers of sea turtles’ journeys.
C.Specific changes of sea turtles’ destinations.
D.Signals offered by each area’s magnetic features.
√
词义猜测题。根据画线词下文“Several magnetic features are geographically different so that every place has its own magnetic address，which allows sea turtles to sense their present magnetic addresses and set course for the magnetic addresses of their destinations...keep them safe.”可知，每个地方都有其自身的磁场地址，海龟天生就有识别海洋中特定磁场地址的能力，并能游向安全的方向，所以“地图”指的是“每个区域的磁场特征所提供的信号”，故选D。
解析
4.In which aspect does studying turtles’ magnetic navigation play an important role
A.Protecting the species.
B.Recognizing sea animals.
C.Collecting more turtles.
D.Improving sea conditions.
√
推理判断题。根据最后一段中“If researchers keep such needs in mind，it seems likely that the same skills that guided turtles for the last 120 million years will keep them on track for the next 120 million years.”可知，研究海龟的磁导航在未来保护海龟物种方面起着重要的作用，故选A。
解析
B
The ocean covers approximately 70% of Earth’s surface.It’s the largest livable space on our planet，and there’s more life there than anywhere else on Earth.Through exploration，we’re learning more about its biological，chemical，physical，and geological(地质的) aspects. Exploration leads to discovery，but before we can truly explore，we must map.
语篇解读　本文是一篇说明文，作者详细解释了海洋探索的重要性、海底测绘的现状、海洋生物的多样性以及我们对海洋及其生物的了解程度。文章通过提供数据、事实和科学估计来支持其观点，并强调了继续探索和研究海洋的必要性。
Seafloor mapping provides a sense of what may lie beneath and guides decisions about where to explore.While the entire seafloor has been mapped using data collected from satellites，these data provide only a general picture of what’s there.Detail is limited on these maps，so some important geographical features like seamounts and objects like shipwrecks(失事船只) remain unseen.
As of 2023,24.9% of the global seafloor had been mapped with modern high-resolution(高分辨率的) technology，usually fixed on ships，which can reveal the seafloor in greater detail.While almost 50% of the seafloor beneath U.S.waters had been mapped to these modern standards，the nation’s seafloor is larger than the land area of all 50 states.Thus，there’s still a significant amount of seafloor left to be mapped at high resolution.
More is known about the seafloor than the species that call the ocean home.Seafloor maps can provide information about potential habitats，but they can’t identify species on the seafloor or provide information about how they interact with each other and their environments.Scientists estimate there may be between 700,000 and 1 million species in the ocean.Roughly two-thirds of these species have yet to be discovered or officially described，with almost 2,000 new species accepted by the scientific community each year.
We have a great deal more to learn about our ocean and what lives in it，but progress is being made.We learn more and more each year.But the ocean will never be fully explored.Earth is constantly changing，and it’s important to understand these changes given the importance of the ocean in our everyday lives.
5.Why is seafloor mapping important for exploring the ocean
A.It reveals all objects on the seafloor.
B.It shows the seafloor in greater detail.
C.It guides decisions about where to sail.
D.It provides a general picture of the earth.
√
细节理解题。根据第二段可知，海底测绘可以感知海底有什么，并指导决定到哪里探索。虽然利用卫星收集的数据绘制了整个海底的地图，但这些数据只提供了那里的大致情况。这些地图上的细节有限，因此一些重要的地理特征，如海底山和沉船等物体仍然看不到。由此可知，海底测绘之所以对于海洋探索很重要，是因为卫星数据地图上有些细节看不到，海底测绘可以展示海底更详细的情况。故选B。
解析
6.Why is the seafloor beneath U.S.waters mentioned in paragraph 3
A.To stress the further task of mapping the seafloor.
B.To explain the standards of mapping the seafloor.
C.To illustrate the geographical features of the seafloor.
D.To highlight the significance of mapping the seafloor.
√
推理判断题。根据第三段中的“While almost 50% of...left to be mapped at high resolution.(虽然美国水域下近50%的海底已经按照这些现代标准绘制了地图，但美国的海底面积比所有50个州的陆地面积都要大。因此，仍有大量的海底有待以高分辨率绘制。)”可知，第三段提到美国水域下方的海底是为了强调绘制海底地图的进一步任务还很艰巨。故选A。
解析
7.What can we learn from the seafloor maps
A.The quality of the water.
B.The environment of ocean.
C.The homes of sea species.
D.The endangered sea species.
√
细节理解题。根据第四段中的“Seafloor maps can provide information about potential habitats，but they can’t identify species on the seafloor or provide information about how they interact with each other and their environments.(海底地图可以提供关于潜在栖息地的信息，但它们不能识别海底的物种，也不能提供关于它们如何相互作用以及它们的环境的信息。)”可知，通过海底地图我们可以了解海洋物种的栖息地。故选C。
解析
8.What is the best title of the text
A.How Can the Seafloor Be Mapped
B.What Species Are Living in the Ocean
C.Why Is It Important to Exploit the Ocean
D.How Much of the Ocean Has Been Explored
√
标题归纳题。通读全文可知，作者详细解释了海洋探索的重要性、海底测绘的现状、海洋生物的多样性以及我们对海洋及其生物的了解程度。文章通过提供数据、事实和科学估计来支持其观点，并强调了继续探索和研究海洋的必要性。选项D“How Much of the Ocean Has Been Explored (有多少海洋已经被勘探过了？)”符合题意。故选D。
解析
While so many birds visit our leafy garden every year，it’s the pair of tawny frogmouths(茶色夜鹰) that have been returning for years to 1 their young that bring the most excitement.
语篇解读　本文是一篇记叙文。文章主要描述了一对茶色夜鹰在作者家的花园中抚养幼鸟的情景，特别是在一场暴风雨中如何保护幼鸟的经过。
Ⅱ.完形填空
1.A.monitor B.save C.raise D.teach
monitor监督；save挽救；raise提高，抚养；teach教。根据下文“It’s been wonderful to observe how both parents take on the duty of caring for their young.”可知，空处指的是这对茶色夜鹰每年都会回来抚养幼鸟。故选C。
解析
√
It’s been wonderful to observe how both parents take on the 2 duty of caring for their young.
Last summer the frogmouth family，parents and two babies，was 3 sitting in a tree close to our back deck 4 the late afternoon sunshine.
2.A.painful B.risky
C.simple D.serious
3.A.happily B.nervously
C.hungrily D.bravely
4.A.avoiding B.enjoying
C.expecting D.following
√
√
√
2.painful痛苦的；risky冒险的；simple简单的；serious严重的，认真的。根据下文内容可知，这对父母非常认真地履行着照顾幼鸟的责任。故选D。
3.happily开心地；nervously紧张地；hungrily饥饿地；bravely勇敢地。根据下文“sitting in a tree close to our back deck the late afternoon sunshine”可知，茶色夜鹰一家开心地坐在树上享受傍晚的阳光。故选A。
4.avoid避免；enjoy享受；expect期待；follow追随。根据上文“Last summer the frogmouth family，parents and two babies，was sitting in a tree close to our back deck”和下文“the late afternoon sunshine”可知，茶色夜鹰一家在享受阳光。故选B。
解析
With little 5 ，dark clouds emerged，and 6 rain began to fall.
5.A.chance B.hope
C.reporting D.warning
6.A.light B.heavy
C.freezing D.seasonal
√
√
5.chance机会；hope希望；reporting报道；warning警告，预告。根据“dark clouds emerged”以及上文“夜鹰一家在享受阳光”可知，这场雨来得没有预兆。故选D。
6.light轻的，细微的；heavy重的；freezing冰冻的；seasonal季节性的。根据下文“At first the birds seemed to enjoy the rain and moved out along the branch，fluffing up(抖开) their feathers to the wet weather.”可知，起初鸟儿很享受这场雨，由此可知，雨下得并不大。故选A。
解析
At first the birds seemed to enjoy the rain and moved out along the branch，fluffing up(抖开) their feathers to 7 the wet weather.But within minutes，day turned to night.Dark clouds brought a 8 heavy storm；
7.A.pay attention to B.keep track of
C.get rid of D.take advantage of
8.A.late B.slow
C.sudden D.perfect
√
√
7.pay attention to注意；keep track of追踪，记录；get rid of摆脱；take advantage of利用。根据空前的“fluffing up(抖开) their feathers”可知，鸟儿刚开始很享受雨水，所以此处指的是利用潮湿的天气。故选D。
8.late迟的，晚的；slow缓慢的；sudden突然的；perfect完美的。根据上文“But within minutes，day turned to night.”可推测，几分钟之内，细雨就变成了暴雨，由此可知，这场暴风雨来得很突然。故选C。
解析
crashing thunder and blinding lightning，wild winds and driving rain turned the garden into a(n) 9 place for the little family.
Through the flashes of lightning，we watched in 10 as the parents guided their young back along the branch until they were all gathered close to the tree trunk，
9.A.attractive B.unsafe
C.hiding D.unimportant
10.A.amazement B.horror
C.embarrassment D.regret
√
√
9.attractive有吸引力的；unsafe不安全的；hiding躲藏的；unimportant不重要的。根据上文“crashing thunder and blinding lightning，wild winds and driving rain”可推测，此时的花园对茶色夜鹰一家来说是不安全的地方。故选B。
10.amazement惊异；horror恐怖；embarrassment尴尬；regret遗憾，后悔。根据下文“as the parents guided their young back along the branch until they were all gathered close to the tree trunk，both parents spreading their wings over their young to them from the rain”可推测，作者一家看到这对茶色夜鹰在暴风雨中保护幼鸟应该是感到很惊奇。in amazement意为“惊奇地”，符合句意。故选A。
解析
both parents spreading their wings over their young to 11 them from the rain.When the storm passed，the family walked 12 out along the branch and spread their wings to enjoy the sunshine.
11.A.remove B.distract
C.protect D.separate
12.A.quietly B.away
C.back D.sleepily
√
√
11.remove去除；distract使分心；protect保护；separate分隔。根据上文的“spreading their wings over their young”可知，这对茶色夜鹰将翅膀张开在幼鸟身上。根据常理可知，此举是为了保护幼鸟不被雨淋。故选C。
12.quietly安静地；away远离；back向后，回来；sleepily懒散地。根据上文内容可知，大雨来临时，茶色夜鹰一家沿着树枝来到树干处。而暴风雨过去后，夜鹰一家又回来享受阳光。故选C。
解析
When I look up at the pair of tawny frogmouths who continue to 13 our garden，I know I’m not just looking at 14 parents，but very 15 ones.
13.A.visit B.decorate
C.approach D.clean
14.A.restless B.devoted
C.shy D.determined
15.A.proud B.lucky
C.demanding D.wise
√
√
√
13.visit逗留，拜访；decorate装饰；approach接近，解决；clean清理。此处考查原词重现，根据文章第一段中“While so many birds visit our leafy garden every year”可知，空处指的是“拜访”。故选A。
14.restless坐立不安的；devoted投入的；shy害羞的；determined坚定的。根据上文内容可知，这对夜鹰父母非常尽职尽责地在抚育幼鸟。故选B。
15.proud自豪的；lucky幸运的；demanding要求高的；wise明智的，聪明的。根据上文内容可知，暴风雨来临时，这对夜鹰父母将幼鸟带到树干处，并张开翅膀保护幼鸟。由此可知，这对夜鹰父母非常聪明。故选D。
解析
本课结束Period 3　Listening and Speaking
Ⅰ.选择填空(高考形式)
Listen to the conversation on P30 and choose the best answer.
1．How many reasons are mentioned for whale research
A．One. B．Two. C．Three.
答案　C
2．What do whales use sounds for
A．Singing and sharing.
B．Hunting and interacting.
C．Teaching and helping others.
答案　B
3．Why do the campers take pictures of the whales’ fins
A．To distinguish them.
B．To give whales different names.
C．To send the pictures to other research groups.
答案　A
Ⅱ.听力填空(精听训练)
Listen to the conversation on P30 again and fill in the blanks with the words you hear.
Craig：Here at the camp we are wild about whales! Today you have been helping us with our 1.whale research.First of all，we asked you to find out some facts for a whale profile.What did you find，Sally
Sally：There are over 2.80 different species of whales.These include the blue whale，the largest known animal to have ever existed.They can grow to 100 feet long，and can weigh nearly 200 tons! There are two main types of whale: those 3.with teeth，and those without.Those without teeth eat very small organisms，whereas those with teeth eat fish and other larger sea animals.More than 70 species of whales have teeth.
Craig：Great! Then，we asked you to think about why we do whale research.Yes，Ben.
Ben：Firstly，it is 4.to monitor how many whales there are.Whales are threatened by many factors，including climate change，pollution，and hunting.Secondly，it is to track where whales go，so we can understand more about them，like their life cycle.Lastly，we know that whales are very 5.intelligent.They communicate and hunt using complex sounds，and even sing and share songs.They can learn by themselves and can teach the things they have learnt to 6.their young.We want to understand more about this.
Craig：Very good，Ben.And lastly，we asked you to go out with us and write a report of the work we do.Can you give us your report，Luke
Luke：Yes.First，we followed a group of whales with the boat.Then we 7.took pictures of their fins.Most whales have slightly different fins and marks，which can help us 8.to tell them apart.Meanwhile，we also noted their location，so we can track their movements and plot their migration path.Later，we created a database of their fins and locations.After that，we gave the group of whales a name，and each member a number.They will be added to the directory so we can 9.identify them in the future.Finally，we 10.contacted other whale research groups around the world to share the information with them.
Craig：Excellent! Thank you all for your help today.
作业3
[分值：35分]
Ⅰ.主题语篇阅读(共8小题；每小题2.5分，满分20分)
A
Sea turtles(海龟) live life on the move.Adult sea turtles move repeatedly between feeding and breeding(繁殖) areas.So the question naturally arises：How do turtles guide their journeys across the vast water without landmarks？Thirty years of work with turtles has provided a framework for understanding those remarkable travels.
A sea turtle’s first migration seems a simple task：swimming toward the open ocean and away from land.Newly hatched sea turtles cannot see the direction of the open ocean.When entering the sea，they dive under the surface，use water motion caused by waves to determine the direction，and then swim directly toward open water.
Sea turtles can also keep a course in one direction using biological compasses based on the sun’s or the earth’s magnetic field(磁场)．For young turtles，however，a compass alone isn’t enough to keep them safe.Fortunately，the earth’s magnetic field provides turtles with a map.Several magnetic features are geographically different so that every place has its own magnetic address，which allows sea turtles to sense their present magnetic addresses and set course for the magnetic addresses of their destinations.Sea turtles are born with the ability to recognize specific magnetic addresses in the ocean and to swim in directions that keep them safe.For example，Florida turtles don’t travel too far north into dangerous cold waters.
The amazing magnetic navigation(导航) of turtles is of importance.Conservationists need to make sure that turtles can recognize their birthplace and the feeding area in a natural magnetic environment.Animals programmed to migrate in the Atlantic Ocean are unlikely to navigate properly in the Pacific and vice versa.If researchers keep such needs in mind，it seems likely that the same skills that guided turtles for the last 120 million years will keep them on track for the next 120 million years.
语篇解读　这是一篇说明文，主要讲了海龟是如何利用水流的运动以及太阳和地球的磁场在水下辨别方向的。
1．Why is the question raised in the first paragraph
A．To make a prediction.
B．To come up with a solution.
C．To introduce the topic of the text.
D．To describe sea turtles’ life cycle.
答案　C
解析　推理判断题。第一段中“So the question naturally arises：How do turtles guide their journeys across the vast water without landmarks？”提出问题：海龟是如何在没有地标的情况下在广阔的水域中引导自己的旅程的？下文主要是围绕该问题展开，故第一段提出问题是为了引入本文的主题，故选C。
2．What do we know about newborn sea turtles from paragraph 2
A．Their motion changes how waves are moving.
B．They can directly identify the ocean’s direction.
C．Their journey to the open ocean is quite simple.
D．They rely on sea waves to figure out the direction.
答案　D
解析　细节理解题。根据第二段中“Newly hatched sea turtles...use water motion caused by waves to determine the direction...”可知，刚孵出的海龟依靠海浪来确定方向，故选D。
3．What does the word “map” underlined in paragraph 3 refer to
A．Approaches to escaping from enemies.
B．Potential dangers of sea turtles’ journeys.
C．Specific changes of sea turtles’ destinations.
D．Signals offered by each area’s magnetic features.
答案　D
解析　词义猜测题。根据画线词下文“Several magnetic features are geographically different so that every place has its own magnetic address，which allows sea turtles to sense their present magnetic addresses and set course for the magnetic addresses of their destinations...keep them safe.”可知，每个地方都有其自身的磁场地址，海龟天生就有识别海洋中特定磁场地址的能力，并能游向安全的方向，所以“地图”指的是“每个区域的磁场特征所提供的信号”，故选D。
4．In which aspect does studying turtles’ magnetic navigation play an important role
A．Protecting the species.
B．Recognizing sea animals.
C．Collecting more turtles.
D．Improving sea conditions.
答案　A
解析　推理判断题。根据最后一段中“If researchers keep such needs in mind，it seems likely that the same skills that guided turtles for the last 120 million years will keep them on track for the next 120 million years.”可知，研究海龟的磁导航在未来保护海龟物种方面起着重要的作用，故选A。
B
The ocean covers approximately 70% of Earth’s surface.It’s the largest livable space on our planet，and there’s more life there than anywhere else on Earth.Through exploration，we’re learning more about its biological，chemical，physical，and geological(地质的) aspects.Exploration leads to discovery，but before we can truly explore，we must map.
Seafloor mapping provides a sense of what may lie beneath and guides decisions about where to explore.While the entire seafloor has been mapped using data collected from satellites，these data provide only a general picture of what’s there.Detail is limited on these maps，so some important geographical features like seamounts and objects like shipwrecks(失事船只) remain unseen.
As of 2023,24.9% of the global seafloor had been mapped with modern high-resolution(高分辨率的) technology，usually fixed on ships，which can reveal the seafloor in greater detail.While almost 50% of the seafloor beneath U．S.waters had been mapped to these modern standards，the nation’s seafloor is larger than the land area of all 50 states.Thus，there’s still a significant amount of seafloor left to be mapped at high resolution.
More is known about the seafloor than the species that call the ocean home.Seafloor maps can provide information about potential habitats，but they can’t identify species on the seafloor or provide information about how they interact with each other and their environments.Scientists estimate there may be between 700,000 and 1 million species in the ocean.Roughly two-thirds of these species have yet to be discovered or officially described，with almost 2,000 new species accepted by the scientific community each year.
We have a great deal more to learn about our ocean and what lives in it，but progress is being made.We learn more and more each year.But the ocean will never be fully explored.Earth is constantly changing，and it’s important to understand these changes given the importance of the ocean in our everyday lives.
语篇解读　本文是一篇说明文，作者详细解释了海洋探索的重要性、海底测绘的现状、海洋生物的多样性以及我们对海洋及其生物的了解程度。文章通过提供数据、事实和科学估计来支持其观点，并强调了继续探索和研究海洋的必要性。
5．Why is seafloor mapping important for exploring the ocean
A．It reveals all objects on the seafloor.
B．It shows the seafloor in greater detail.
C．It guides decisions about where to sail.
D．It provides a general picture of the earth.
答案　B
解析　细节理解题。根据第二段可知，海底测绘可以感知海底有什么，并指导决定到哪里探索。虽然利用卫星收集的数据绘制了整个海底的地图，但这些数据只提供了那里的大致情况。这些地图上的细节有限，因此一些重要的地理特征，如海底山和沉船等物体仍然看不到。由此可知，海底测绘之所以对于海洋探索很重要，是因为卫星数据地图上有些细节看不到，海底测绘可以展示海底更详细的情况。故选B。
6．Why is the seafloor beneath U．S.waters mentioned in paragraph 3
A．To stress the further task of mapping the seafloor.
B．To explain the standards of mapping the seafloor.
C．To illustrate the geographical features of the seafloor.
D．To highlight the significance of mapping the seafloor.
答案　A
解析　推理判断题。根据第三段中的“While almost 50% of...left to be mapped at high resolution.(虽然美国水域下近50%的海底已经按照这些现代标准绘制了地图，但美国的海底面积比所有50个州的陆地面积都要大。因此，仍有大量的海底有待以高分辨率绘制。)”可知，第三段提到美国水域下方的海底是为了强调绘制海底地图的进一步任务还很艰巨。故选A。
7．What can we learn from the seafloor maps
A．The quality of the water.
B．The environment of ocean.
C．The homes of sea species.
D．The endangered sea species.
答案　C
解析　细节理解题。根据第四段中的“Seafloor maps can provide information about potential habitats，but they can’t identify species on the seafloor or provide information about how they interact with each other and their environments.(海底地图可以提供关于潜在栖息地的信息，但它们不能识别海底的物种，也不能提供关于它们如何相互作用以及它们的环境的信息。)”可知，通过海底地图我们可以了解海洋物种的栖息地。故选C。
8．What is the best title of the text
A．How Can the Seafloor Be Mapped
B．What Species Are Living in the Ocean
C．Why Is It Important to Exploit the Ocean
D．How Much of the Ocean Has Been Explored
答案　D
解析　标题归纳题。通读全文可知，作者详细解释了海洋探索的重要性、海底测绘的现状、海洋生物的多样性以及我们对海洋及其生物的了解程度。文章通过提供数据、事实和科学估计来支持其观点，并强调了继续探索和研究海洋的必要性。选项D“How Much of the Ocean Has Been Explored (有多少海洋已经被勘探过了？)”符合题意。故选D。
Ⅱ.完形填空(共15小题；每小题1分，满分15分)
While so many birds visit our leafy garden every year，it’s the pair of tawny frogmouths(茶色夜鹰) that have been returning for years to 1 their young that bring the most excitement.It’s been wonderful to observe how both parents take on the 2 duty of caring for their young.
Last summer the frogmouth family，parents and two babies，was 3 sitting in a tree close to our back deck 4 the late afternoon sunshine.With little 5 ，dark clouds emerged，and 6 rain began to fall.
At first the birds seemed to enjoy the rain and moved out along the branch，fluffing up(抖开) their feathers to 7 the wet weather.But within minutes，day turned to night.Dark clouds brought a 8 heavy storm；crashing thunder and blinding lightning，wild winds and driving rain turned the garden into a(n) 9 place for the little family.
Through the flashes of lightning，we watched in 10 as the parents guided their young back along the branch until they were all gathered close to the tree trunk，both parents spreading their wings over their young to 11 them from the rain.When the storm passed，the family walked 12 out along the branch and spread their wings to enjoy the sunshine.
When I look up at the pair of tawny frogmouths who continue to 13 our garden，I know I’m not just looking at 14 parents，but very 15 ones.
语篇解读　本文是一篇记叙文。文章主要描述了一对茶色夜鹰在作者家的花园中抚养幼鸟的情景，特别是在一场暴风雨中如何保护幼鸟的经过。
1．A.monitor B．save
C．raise D．teach
答案　C
解析　monitor监督；save挽救；raise提高，抚养；teach教。根据下文“It’s been wonderful to observe how both parents take on the duty of caring for their young.”可知，空处指的是这对茶色夜鹰每年都会回来抚养幼鸟。故选C。
2．A.painful B．risky
C．simple D．serious
答案　D
解析　painful痛苦的；risky冒险的；simple简单的；serious严重的，认真的。根据下文内容可知，这对父母非常认真地履行着照顾幼鸟的责任。故选D。
3．A.happily B．nervously
C．hungrily D．bravely
答案　A
解析　happily开心地；nervously紧张地；hungrily饥饿地；bravely勇敢地。根据下文“sitting in a tree close to our back deck the late afternoon sunshine”可知，茶色夜鹰一家开心地坐在树上享受傍晚的阳光。故选A。
4．A.avoiding B．enjoying
C．expecting D．following
答案　B
解析　avoid避免；enjoy享受；expect期待；follow追随。根据上文“Last summer the frogmouth family，parents and two babies，was sitting in a tree close to our back deck”和下文“the late afternoon sunshine”可知，茶色夜鹰一家在享受阳光。故选B。
5．A.chance B．hope
C．reporting D．warning
答案　D
解析　chance机会；hope希望；reporting报道；warning警告，预告。根据“dark clouds emerged”以及上文“夜鹰一家在享受阳光”可知，这场雨来得没有预兆。故选D。
6．A.light B．heavy
C．freezing D．seasonal
答案　A
解析　light轻的，细微的；heavy重的；freezing冰冻的；seasonal季节性的。根据下文“At first the birds seemed to enjoy the rain and moved out along the branch，fluffing up(抖开) their feathers to the wet weather.”可知，起初鸟儿很享受这场雨，由此可知，雨下得并不大。故选A。
7．A.pay attention to B．keep track of
C．get rid of D．take advantage of
答案　D
解析　pay attention to注意；keep track of追踪，记录；get rid of摆脱；take advantage of利用。根据空前的“fluffing up(抖开) their feathers”可知，鸟儿刚开始很享受雨水，所以此处指的是利用潮湿的天气。故选D。
8．A.late B．slow
C．sudden D．perfect
答案　C
解析　late迟的，晚的；slow缓慢的；sudden突然的；perfect完美的。根据上文“But within minutes，day turned to night.”可推测，几分钟之内，细雨就变成了暴雨，由此可知，这场暴风雨来得很突然。故选C。
9．A.attractive B．unsafe
C．hiding D．unimportant
答案　B
解析　attractive有吸引力的；unsafe不安全的；hiding躲藏的；unimportant不重要的。根据上文“crashing thunder and blinding lightning，wild winds and driving rain”可推测，此时的花园对茶色夜鹰一家来说是不安全的地方。故选B。
10．A.amazement B．horror
C．embarrassment D．regret
答案　A
解析　amazement惊异；horror恐怖；embarrassment尴尬；regret遗憾，后悔。根据下文“as the parents guided their young back along the branch until they were all gathered close to the tree trunk，both parents spreading their wings over their young to them from the rain”可推测，作者一家看到这对茶色夜鹰在暴风雨中保护幼鸟应该是感到很惊奇。in amazement意为“惊奇地”，符合句意。故选A。
11．A.remove B．distract
C．protect D．separate
答案　C
解析　remove去除；distract使分心；protect保护；separate分隔。根据上文的“spreading their wings over their young”可知，这对茶色夜鹰将翅膀张开在幼鸟身上。根据常理可知，此举是为了保护幼鸟不被雨淋。故选C。
12．A.quietly B．away
C．back D．sleepily
答案　C
解析　quietly安静地；away远离；back向后，回来；sleepily懒散地。根据上文内容可知，大雨来临时，茶色夜鹰一家沿着树枝来到树干处。而暴风雨过去后，夜鹰一家又回来享受阳光。故选C。
13．A.visit B．decorate
C．approach D．clean
答案　A
解析　visit逗留，拜访；decorate装饰；approach接近，解决；clean清理。此处考查原词重现，根据文章第一段中“While so many birds visit our leafy garden every year”可知，空处指的是“拜访”。故选A。
14．A.restless B．devoted
C．shy D．determined
答案　B
解析　restless坐立不安的；devoted投入的；shy害羞的；determined坚定的。根据上文内容可知，这对夜鹰父母非常尽职尽责地在抚育幼鸟。故选B。
15．A.proud B．lucky
C．demanding D．wise
答案　D
解析　proud自豪的；lucky幸运的；demanding要求高的；wise明智的，聪明的。根据上文内容可知，暴风雨来临时，这对夜鹰父母将幼鸟带到树干处，并张开翅膀保护幼鸟。由此可知，这对夜鹰父母非常聪明。故选D。

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