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Unit 2 Iconic Attractions Learning about language——高二英语人教版（2019）选择性必修第四册同步课时作业
一、语法填空
1.Experienced craftsmen are called together to figure out effective approaches to _____(restore) those historical buildings destroyed by the earthquake.
2.We believe that war never settles anything. It only leads to _____(violent).
3.Adolescence is the period ______ teenagers leave childhood and head into adulthood, which is a difficult physical and emotional process.
4.They talk to the flood of international tourists and to _____(visit) Chinese zookeepers who often come to check on the pandas, which are on loan from China.
5.Research has shown that taking at least one day off a week can reduce the ______(frequent) of overuse injuries.
二、完成句子
6.世界上大约40%的植物物种濒临灭绝,世界上大部分食物仅来自少数植物和动物物种。(handful)
About 40% of the world's plant species are endangered, and most of the world's food comes from just _____ _____ _____ _____ _____ _____ _____.
7.最令我印象深刻的是种植在街道两侧的法国梧桐,这座城市因此而闻名。(impress)
_____ _____ _____ _____ is the chinar trees _____ _____ _____ _____ _____ of the street, for which the city is famous.
8.为了丰富《高中生》杂志的内容,我们决定添加一个有关高中生生活的栏目。
_____ _____ _____ _____ of Senior Middle School Students, we decided to add a column about the life of senior middle school students.
9.学校提供了放松的环境,让孩子们感觉就像在家里一样。
The school offers a relaxing environment, which _____ _____ _____ _____ _____.
10.莫高窟位于甘肃省西部丝绸之路沿线,以其雕像和壁画而闻名。
_____ _____ _____ _____ _____ Gansu Province, along the Silk Road, the Mogao Caves are famous for their statues and wall paintings.
三、阅读理解
In 1925, a deadly epidemic(流行病) struck the small town of Nome, Alaska. The total population of the town was only around 1,400 — seven of whom were dead and 19 of whom were sick. To make matters worse, the nearest source of a cure was hundreds of miles away, across the dangerous Alaskan wilderness.
Then, a Siberian husky (a kind of dog) named Balto saved the day. Balto was just one of 150 sled(雪橇) dogs used to deliver medicine to the town through whiteout snow and dangerous ice. And although Balto had never stood out from the rest of the pack(狗群) before, he proved to be surprisingly skillful and tough in the last leg of the journey.
Now known as the Nome Serum(血清) Run of 1925, the race began on January 27, 1925, when 300,000 doses of antitoxin(抗毒素) arrived in Nenana by train from Anchorage. The medicine was placed inside a metallic container, and then taken out into the Alaskan wilds by the first sled driver, “Wild Bill” Shannon, who arrived at the first handoff site with injuries caused by the extreme coldness and two of his dogs lost. Eventually, the medicine made its way to Leonhard Seppala, who set out confidently with his 12-year-old sled dog, Togo, leading the pack.
Togo led Seppala’ s pack until they reached the next sled driver, Charlie Olson, who then passed it down to Gunnar Kaasen. But Togo no longer led the pack. Instead, Kaasen completed the last leg of the journey with Balto as his frontrunner. Although Kaasen couldn’t even see in the whiteout conditions, and temperatures dropped to around 40 degrees Fahrenheit, Balto pressed on, successfully leading the pack to Nome, with the serum, on February 2.
Finally able to rest for the first time since the journey began , Kaasen looked to Balto and said, “What a fine dog!” And with that, Balto became a national hero who remains beloved nearly a century later.
11.What’s the function of paragraph 1
A.To provide background information. B.To inspire the readers’ imagination.
C.To introduce a terrible disease. D.To support an argument.
12.What can be learned about the Nome Serum Run of 1925
A.Its exact starting point was in Nome. B.It suffered the loss of a sled driver.
C.Its aim was to save the 19 sick people. D.It was completed through teamwork.
13.What did Togo do during the journey
A.He saved the serum from being broken.
B.He protected other dogs on the way.
C.He served as the guide of Kaasen.
D.He led the group for some time.
14.What may be a suitable title for the text
A.The Qualities of a Great Sled Dog
B.The Origins of the Alaskan Husky
C.Balto — The Hero of the Nome Serum Run
D.Nome— The Town That Survived an Epidemic
答案以及解析
一、语法填空
1.答案：restoring
解析：句意为:有经验的工匠被召集在一起,找出修复被地震毁坏的历史建筑的有效方法。approach to 中的to为介词,设空处应填动名词作宾语。故填 restoring。
2.答案：violence
解析：句意为:我们认为战争不能解决任何问题。它只会导致暴力。根据句子结构可知,设空处作leads to的宾语,应用名词。violence意为“暴力;暴行”,为不可数名词。故填violence。
3.答案：when
解析：句意为:青春期是青少年告别童年走向成年的时期,这是一个艰难的生理和情感过程。_____ teenagers leave childhood and head into adulthood是定语从句,修饰先行词 the period,关系词在定语从句中作时间状语,所以应用关系副词when。
4.答案：visiting
解析：句意为:他们与蜂拥而来的国际游客和来访的中国动物园管理员们交谈,这些动物园管理员经常来为这些从中国借来的大熊猫做检查。_____Chinese zookeepers为介词 to的宾语,设空处作定语,修饰名词短语Chinese zookeepers, visit与被修饰词Chinese zookeepers之间为主动关系,应用现在分词。故填visiting。
5.答案： frequency
解析：句意为:研究表明,每周至少休息一天可以减少过劳性损伤发生的频率。设空处位于定冠词the和介词of之间,作宾语,应用名词,且frequency表示“发生率”时为不可数名词。故填frequency。
二、完成句子
6.答案：a handful of plant and animal species
7.答案：What impressed me most; planted on the both sides
8.答案：To enrich the contents
9.答案：makes children feel at home
10.答案：Located/Situated in the west of
三、阅读理解
11.答案：A
解析：推理判断题。根据第一段“In 1925, a deadly epidemic (流行病) struck the small town of Nome, Alaska. The total population of the town was only around 1,400 — seven of whom were dead and 19 of whom were sick. To make matters worse, the nearest source of a cure was hundreds of miles away, across the dangerous Alaskan wilderness.(1925年，一场致命的流行病袭击了阿拉斯加州的小镇诺姆。该镇的总人口只有1400人左右，其中7人死亡，19人患病。更糟糕的是，最近的药品来源在数百英里之外，穿过危险的阿拉斯加荒野)”和第二段中“Then, a Siberian husky (a kind of dog) named Balto saved the day. Balto was just one of 150 sled (雪橇) dogs used to deliver medicine to the town through whiteout snow and dangerous ice.(然后，一只名叫巴尔托的西伯利亚哈士奇(一种狗)挽救了局面。巴尔托只是150只雪橇犬中的一只，它们被用来穿过白雪皑皑的雪地和危险的冰面向小镇运送药品)”可推知，第一段主要介绍了1925年阿拉斯加州诺姆镇爆发流行病的背景情况，包括死亡和患病人数以及药品来源的遥远和危险，为第二段中介绍“名叫巴尔托的西伯利亚哈士奇的英勇事迹”提供了背景信息。故选A项。
12.答案：D
解析：推理判断题。根据第三段中“The medicine was placed inside a metallic container, and then taken out into the Alaskan wilds by the first sled driver, ‘Wild Bill’ Shannon, who arrived at the first handoff site with injuries caused by the extreme coldness and two of his dogs lost. Eventually, the medicine made its way to Leonhard Seppala, who set out confidently with his 12-year-old sled dog, Togo, leading the pack.(药品被放在一个金属容器里，然后由第一位雪橇司机‘Wild Bill’Shannon带出阿拉斯加荒野，他在第一个交接点因极度寒冷而受伤，并且失去了两只狗。最终，药品被送到了Leonhard Seppala手中，他满怀信心地带着他12岁的雪橇狗Togo，领着狗群出发了)”和第四段中“Togo led Seppala’ s pack until they reached the next sled driver, Charlie Olson, who then passed it down to Gunnar Kaasen.(Togo领着Seppala的狗群，直到他们到达下一个雪橇司机Charlie Olson那里，然后Charlie Olson把它交给了Gunnar Kaasen)”可知，在运送药品的过程中，多位雪橇司机和他们的狗接力完成了任务，体现了团队合作。因此，1925年诺姆血清运送是通过团队合作完成的。故选D项。
13.答案：D
解析：细节理解题。根据第四段“Togo led Seppala’ s pack until they reached the next sled driver, Charlie Olson (Togo领着Seppala的狗群，直到他们到达下一个雪橇司机Charlie Olson那里)”可知，Togo在旅程中领着Seppala的狗群走了一段路。故选D项。
14.答案：C
解析：主旨大意题。通读全文，特别是根据第二段中“Then, a Siberian husky (a kind of dog) named Balto saved the day.(然后，一只名叫巴尔托的西伯利亚雪橇犬(一种狗)挽救了局面)”和最后一段中“And with that, Balto became a national hero who remains beloved nearly a century later.(就这样，巴尔托成为了一个国家英雄，近一个世纪后仍然深受人们爱戴)”可知，文章主要讲述了一只名叫巴尔托的雪橇狗在1925年诺姆血清运送中发挥关键作用，最终成为国家英雄的故事。因此，C项“Balto — The Hero of the Nome Serum Run(巴尔托——诺姆血清运送的英雄)”最适合作为文章标题。故选C项。Unit 2 Iconic Attractions Reading and Thinking——高二英语人教版（2019）选择性必修第四册同步课时作业
一、语法填空
1.Innsbruck stole my heart with the stunning architecture, majestic mountains and friendly people. I couldn't wait _____(return) to explore more of this delightful European city.
2._____(convince) the data was accurate, they decided to continue this study.
3.With the progress of history, the old _____(politics) system had become unable to adapt to the requirements of economic and social development.
4.With each problem concerning the globe and the area______ (discuss), the summit closed successfully.
5.We all share a _____(join) responsibility to protect and preserve our heritage sites, not just for ourselves, but for future generations.
6.He was impressed _____ the rural architectural work designed by the young architects.
7._____(locate) in the city of Guanghan, the ruins covering an area of 12 square km are believed to be the remains of the Shu Kingdom.
8.Systemic damage to Nature will take away the _____(found) of human survival and development.
9.The astronaut remained _____ contact with ground control throughout the flight.
10.Gaming can certainly be fun and relaxing but excessive gaming can lead _____ adolescents with nearsightedness and have a negative effect on the social lives of children.
二、七选五
The country of Egypt in northeastern Africa is famous as a world-class tourist spot. The mysterious ancient pyramids are its most appealing attraction, but not the only one. ① ______
Like many parts of the earth, the desert was once in the water. It gets its name from the large white rocks and white sand drifts (沙堆) that have been formed by many years of erosion and weathering. ② ______ Many people then enjoy viewing the White Desert near sunrise or sunset because the angle of the light creates a golden tone and its surroundings become fascinatingly pink and orange. It is also known that the desert looks best on a full-moon night, which glows blue and silver.
Located about 370 km southwest of the capital, it is a five-hour drive from Cairo to the White Desert. Many tour companies offer multi-day tours and activities to explore the area. Camping in tents is a romantic experience. ③ ______ Most tours of the White Desert will include a visit to the Crystal Mountain. There is also the Black Desert nearby, which many tours will include.
④______ The unique environment is full of wonders and it is amazing to see how life has adapted to the environment there. Bedouins use the sand of the desert like an oven to cook authentic traditional food, which you can enjoy. Desert animals usually sleep during the day in holes or tunnels underground to stay cool, coming out when it is cooler. ⑤ ______ Only some kinds of plants can live in desert which have a way to keep water in their stems, leaves or trunks. They also have a large root system to gather up all the possible water when it rains.
A. The white sand reflects the light from the sky.
B.You can even find some fossils of marine life.
C. The desert comes in a variety of colors in the daytime.
D.Sandboarding is a fresh sport that can be done on large sand drifts.
E. However, the real charm of a desert tour is not in shining attractions.
F.You might be visited by the local fox looking for your dinner leftovers.
G. The White Desert has recently been gaining in popularity with adventure travelers.
答案以及解析
一、语法填空
1.答案： to return
解析：句意为:因斯布鲁克以其绝美的建筑、雄伟的高山和友好的人民贏得了我的心。我迫不及待地想回去对这个令人愉快的欧洲城市进行更深的探索。can’t/couldn't wait to do sth为固定搭配,意为“迫不及待做某事”。故填to return。
2.答案： Convinced
解析：句意为:因为确信数据是准确的,他们决定继续这项研究。设空处在此处是非谓语动词作状语,convince与主语they之间是逻辑上的被动关系,所以应用过去分词。故填Convinced。
3.答案： political
解析：句意为:随着历史的进步,旧的政治制度已经不能适应经济和社会发展的要求。设空处修饰名词system,作定语,表示“政治的”,应用形容词。故填political。
4.答案：discussed
解析：句意为: 随着有关全球和地区问题的逐一讨论完毕,这次峰会圆满闭幕。此处为 “with+宾语+宾语补足语”结构,设空处用非谓语动词作 with 复合结构中的宾语补足语, discuss 与 each problem 之间为逻辑上的被动关系, 表示动作的完成,所以应用过去分词。故填 discussed。
5.答案：joint
解析：句意为:保护我们的遗址是我们共同的责任,这不仅是为了我们自己,也是为了我们的后代。分析句子成分可知,设空处修饰名词responsibility,应用形容词作定语。故填joint。
6.答案：with/by
解析：句意为:他对这些年轻建筑师设计的乡村建筑作品印象深刻。此处考查短语be impressed with/by...,意为“对……印象深刻”。故填with/by。
7.答案： Located
解析：句意为:该遗址位于广汉市,占地12平方千米,被认为是蜀国遗址。分析句子成分可知,该句已有谓语are believed to be,设空处应用非谓语动词作状语;be located in为固定用法,意为“位于;坐落于”。故填Located。
8.答案： foundation
解析：句意为:对大自然的系统性破坏将夺走人类生存和发展的基础。设空处作动词短语take away的宾语,且空前有定冠词the修饰,空后有介词of,应用名词。故填foundation。
9.答案： in
解析：句意为:这名宇航员在整个飞行过程中始终与地面控制人员保持着联系。in contact with...为固定搭配,意为“与……联系”。故填in。
10.答案： to
解析：句意为:玩电脑游戏当然是有趣和放松的,但过度玩电脑游戏会导致青少年近视,并对儿童的社会生活产生负面影响。lead to为固定搭配,意为“导致;造成”。
二、七选五
答案：GADEF
解析：①过渡句。上文讲到,非洲东北部的埃及是著名的世界级旅游景点。古老神秘的金字塔是它最吸引人的景点,但不是唯一的。下面几段都在介绍埃及的另一个景点—白沙漠。所以设空处应起到承上启下的作用,从金字塔过渡到白沙漠。选项G“白沙漠最近在冒险旅行者中越来越受欢迎”符合语境。故选G。
②细节句。下文讲到许多人喜欢在日出或日落前后观看白沙漠,因为光线的角度会产生金色的色调,周围的环境会变成迷人的粉红色和橙色。选项A“白色的沙子反射来自天空的光线”解释了下文,符合语境。故选A。
③细节句。本段第二句谈到很多旅游公司提供为期多日的旅游和活动。第三句介绍了在帐篷里野营这个活动,是对第二句中提到的活动的举例。选项D“滑沙是一项新鲜的运动,可以在大沙堆上进行”与第三句并列,也是对第二句中提到的活动的举例。故选D。
④主旨句。设空处位于句首,为本段主旨句。设空处下一句谈到,独特的环境充满了奇迹,看到那里的生命是如何适应环境的真是令人惊讶。下而几句则具体介绍了那里的人、动物和植物是如何适应环境的。由此可知,本段所介绍的不是景点,而是那里的人和动植物,选项E“然而,沙漠之旅的真正魅力不在于闪光的景点”符合题意。故选E。
⑤细节句。上文讲到沙漠动物通常白天睡在地下的洞或隧道里以保持凉爽,天气凉爽时再出来,由此推测它们出来时可能是在凉爽的晚上,选项F“当地的狐狸可能会来找你的晚餐剩菜”承接上文,符合语境。故选F。Unit 2 Iconic Attractions Using Language——高二英语人教版（2019）选择性必修第四册同步课时作业
一、语法填空
1.After school, there were many clubs to join and the one _________ attracted me most was the Rugby Club.
2.For most of the teenagers, it can be difficult _________ their parents treat them like a child but expect them to act like an adult.
3.Approaches to _________ (deal) with the problem have caused heated discussion among the students.
4.Jordan's skills were impressive, but the mental _________ (strong) that he showed made him unique.
5.We _________ (request) to wear the uniform in formal situations.
二、翻译句子
6.在山间远足时，他的腿被一条蛇咬了一口。（bite，用V-ing作状语）
______________________________________________________________________________
7.要记住，你的个人信息一定要保密。（keep in mind, keep……private）
______________________________________________________________________________
8.父母应该让孩子的内心平静而充实。(soul)
______________________________________________________________________________
9.Additionally our teachers will be invited to be the judges.
______________________________________________________________________________
10.The participants will be required to be dressed in school uniforms.
______________________________________________________________________________
三、阅读理解
A primary school in north Devon with a brand-new mud play area hit the headlines last week.
“We felt that our children needed something better at playtime,” said the head teacher, Amy Frost, “The playground before was pristine (整洁的) but there was nothing for them to do. As schools, we have been fearful of allowing our children to take risks. Children don’t learn what risk is and how to manage risk.” To change this, the school designed different zones for climbing and muddy play.
Frost said there had been a few comments from people who found it “difficult to adjust”, but parents were greatly supportive. “My son is caked in mud but he’s having fun!” one parent commented. Another said, “We’d rather do extra laundry and see them thrive (茁壮成长).”
Children today have less access to unstructured outdoor play than past generations did. Helen Dodd, a professor of child psychology at the University of Exeter, said, “The decline in children getting muddy is part of our risk aversion (风险规避). We want to keep children safe, so we stop children from doing the things that children naturally do. If we want to give children space to connect with nature, they need to do that in an unrestricted way, and a consequence is that they might get muddy.”
There’s also research about the benefits of being in contact with mud, just in terms of the biology of what’s in the mud, and how it affects our immune system. Also, in terms of sensory things. Lots of children now have sensory difficulties. They don’t like the feel of different things, which might come from being kept overly clean.
Children had never before seen so much and experienced so little, said Follett. “All of their experiences are secondary, through screens shut in bedrooms. What they’re lacking is real primary experience, touching, feeling, practicing. You know that feeling of squeezing a handful of mud, and it leaking out through your fingers ”
11.Why was a mud play area built in the primary school
A.To hit the headlines of the newspaper.
B.To satisfy the parents’ needs.
C.To teach children to learn about risks.
D.To upgrade school facilities.
12.What prevents children’s outdoor play
A.Overly concern. B.School regulation.
C.Behavior code. D.Generation gap.
13.What do we know about mud play
A.It may enhance immune system. B.It leads to sensory difficulties.
C.It has become more popular. D.It can cause severe consequences.
14.What’s the passage mainly about
A.How parents become so positive.
B.Why children experience so less.
C.How connection with nature could be built.
D.Why kids should be allowed to play in mud.
答案以及解析
一、语法填空
1.答案：that
解析：考查定语从句。句意:放学后，有很多俱乐部可以加入，其中最吸引我的是橄榄球俱乐部。the one作先行词，在后面的定语从句中作主语，且定语从句由关系代词tat引导。故案为that。
2.答案：when/if
解析：考查连词。句意:对大多数青少年来说，当他们的父母把他们当作孩子对待，却期望他们表现得像大人，这可能会感到困难。分析句子结构可知，此处缺少连接状语从句的连词，表示时间关系，可用when引导时间状语从句。此外，也可使用i导条件状语从句，表示“如果他们的父母把他们当做孩子对待的话”。故填when/if。
3.答案：dealing
解析：考查非谓语动词。句意：解决这个问题的方法在学生中引起了热烈的讨论。approach(es) to...意为“……的方法”，to是介词，跟动名词作宾语。故填dealing。
4.答案：strength
解析：本题主要考查名词。结合句意，乔丹的技术令人印象深刻，但是他所表现出来的精神力量使他与众不同。strong 为形容词，而形容词 mental后应接名词，因此应用 strong 的名词形式 strength 表示“力量”。故正确答案为 strength。
5.答案：are requested
解析：考查时态和语态。句意:我们被要求在正式场合穿制服。空处是句子的谓语动词，陈述客观事实，用一般现在时，主语we与request“要求”之间为被动关系，所以用一般现在时的被动语态，主语是We，be动词用are。故填are requested。
二、翻译句子
6.答案：While hiking in the mountains, he was bitten by a snake on his leg.
解析：考查现在分词作状语、动词、时态和语态被动语态。根据提示词bite以及“被一条蛇咬了一口”可知，句子应用一般过去时的被动语态。bite用于被动结构中，被咬的身体部位常用介词引出。此处指蛇咬到腿的表面，故用固定结构be bitten on the leg，所以这里“他的腿被一条蛇咬了一口”表达为“he was bitten by a snake on the leg”。表示“远足”的动词为hike，为延续性动词，故表示“在……时”可用while引导状语从句。当使用when或while引导时间状语从句时，可以省略与主句中主语相同的主语和系动词（此处为he was），hike与主语he是主动关系，因此“在山间远足时”应用“while+现在分词”作时间状语，可表达为“While hiking in the mountains”。故翻译为：While hiking in the mountains, he was bitten by a snake on the leg.
7.答案：Keep in mind that you must keep your personal information private.
解析：考查祈使句、短语、形容词及情态动词。表示“记住”用Keep in mind；表示“一定、必须”用must；表示“保密”用keep……private；表示“你的个人信息”用your personal information。故翻译为Keep in mind that you must keep your personal information private.
8.答案：Parents should make their children’s soul peaceful and full.
解析：考查名词和形容词。“父母”可使用名词parents在句中作主语，“应该”可使用情态动词should，根据汉语提示可知，该句可使用固定结构“make+宾语+宾补”，“孩子们的内心”可使用名词短语their children’s soul，“平静而充实”可使用形容词短语peaceful and full在句中作宾补。故翻译为：Parents should make their children’s soul peaceful and full.
9.答案：此外，我们的老师将被邀请担任评委。
解析：考查时态语态。副词Additionally表示“此外”，作状语；主语为our teachers“我们的老师”；will be invited to表示“将被邀请”；be the judges表示“担任评委”。为一般将来时的被动语态。故翻译为：此外，我们的老师将被邀请担任评委。
10.答案：参加者必须穿着校服。
解析：考查短语和时态。主语The participants表示“参加者”；will be required to表示“必须，被要求”，为一般将来时的被动语态；be dressed in school uniforms表示“穿着校服”。故翻译为：参加者必须穿着校服。
三、阅读理解
11.答案：C
解析：细节理解题。根据第二段中“As schools, we have been fearful of allowing our children to take risks. Children don’t learn what risk is and how to manage risk.” To change this, the school designed different zones for climbing and muddy play.(作为学校，我们一直害怕让孩子去冒险。孩子们不知道什么是风险以及如何管理风险。”为了改变这种情况，学校设计了不同的攀岩区和泥泞区)”可知，学校要建一个泥地游戏区是为了教孩子们了解风险。故选C项。
12.答案：A
解析：细节理解题。根据第四段中“Helen Dodd, a professor of child psychology at the University of Exeter, said, “The decline in children getting muddy is part of our risk aversion (风险规避). We want to keep children safe, so we stop children from doing the things that children naturally do.(埃克塞特大学儿童心理学教授海伦·多德（Helen Dodd）说：“孩子们弄脏衣服的减少部分是我们规避风险的结果。”我们想保护孩子们的安全，所以我们阻止孩子们做孩子们自然会做的事情)”可知，家长们的过分担心阻碍了孩子们在户外玩耍。故选A项。
13.答案：A
解析：细节理解题。根据倒数第二段中“There’s also research about the benefits of being in contact with mud, just in terms of the biology of what’s in the mud, and how it affects our immune system. Also, in terms of sensory things.(还有一项研究是关于接触泥浆的好处的，就泥浆中的生物成分而言，以及它如何影响我们的免疫系统。在感官方面也是如此。现在很多孩子都有感觉障碍)”可知，泥浆游戏可以增强免疫系统。故选A项。
14.答案：D
解析：主旨大意题。根据文章大意以及最后一段“Children had never before seen so much and experienced so little, said Follett. “All of their experiences are secondary, through screens shut in bedrooms. What they’re lacking is real primary experience, touching, feeling, practicing. You know that feeling of squeezing a handful of mud, and it leaking out through your fingers ”(福莱特说，孩子们从来没有见过这么多，经历过这么少。“他们所有的经历都是次要的，通过卧室里的屏幕。他们缺少的是真正的原始经验、触摸、感觉和实践。你知道那种捏一把泥，然后它从指缝里漏出来的感觉吗？”)”可知，这篇文章主要讲了为什么应该允许孩子在泥里玩。故选D项。

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