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Unit 3 Same or Different？Section A
一、单项选择
1.—When you ______ the two types of monitors，you can know more about them.
—That's true.Let me find their differences and decide which one is better.
A. operate B. compare C. search D. watch
2.—If children _____ with others very often, they will probably have tons of pressure.
—I couldn't agree more. Everyone is special.
A. compared B. have compared C. are compared D. will compare
3.—Let's _____ these two leaves! Can you tell the differences
—Their shapes look the same, but their sizes are a little different.
A. compare B. compete C. cancel D. control
4.Pandas are very ________ and ________. We all like them.
A.friendly; boring B.cute; scary C.shy; smart D.ugly; clever
5.Jenny is very ______ .Her face often turns red when she speaks.
A. active B. shy C. interesting D. scary
6.The parrot can talk and it is very _________.
A.scary B.lazy C.smart D.beautiful
7.Peter, please read the words _____.
A. silent B. loud C. aloud D. loudly
8.Jim will study abroad, so he hopes his friends can _____ the dinner party tonight.
A. hold B. finish C. leave D. attend
9.—What do you notice first about a person
—Usually their _________.
A.appearance B.appearances C.appear D.appearing
10.Don’t laugh. This is a(n) ________ question. Do you really want to leave your job
A.friendly B.amazing C.serious D.funny
二、阅读理解
Mackensey Wilson, a 14-year-old student, never planned to do a science fair until her dogs started getting sick. Mackensey thought it might be because of the pet food. This made her want to know what chemicals(化学品) were in pet food.
To do her research, Mackensey took part in a program where students could visit a high school lab. There she learned how to use different machines. She said it was really cool to use all the instruments and learn how they worked. It was one of the parts she enjoyed the most.
Mackensey read some past studies and learned that a preservative(防腐剂) called BHT was not good for pets. It is used in a lot of pet foods. Mackensey got three popular brands of dry dog food from her friends and family: Acana, Wilderness Legend, and Wellness. She broke the food into small bits and put it in ethanol(乙醇)to find out how much BHT had been in the food. At first, she thought the brands wouldn't have any BHT because it was not listed on the package. However, she unexpectedly discovered that the brand Acana included0.101% of BHT, Wilderness Legend included 0. 124%, and Wellness included 0.104%. “If I continued this topic, my next step would be suggesting that more information be included on the nutritional labels(营养标签) of dog foods, so that dog owners could make decisions with more knowledge about them,” she said.
Preparing for her first science fair made her nervous because she had never done such a thing before. Luckily, she met so many people with different ideas and made a lot of friends there. She said happily, “You can really learn much about science just from being in a science fair, not even winning anything, but just by going there and experiencing it.”
11.What does the underlined word "This" in Paragraph 1 refer to
A. Mackensey's interest in pet food.
B. Mackensey's visit to a high school lab.
C. Mackensey's plan to do scientific research.
D. Mackensey's dogs got sick possibly because of the pet food.
12.Why was Mackensey surprised by the result
A. She finished a difficult experiment.
B. She discovered a new type of chemical.
C. She found more BHT than she expected.
D. She found BHT was missing from the package's list.
13.What can we know about Mackensey's personality according to the passage
A. Careful, quiet and strict. B. Proud, humorous and kind.
C. Confident, active and polite. D. Clever, independent and practical.
14. Put the events about Mackensey into the correct order according to the passage.
a. Mackensey studied earlier research articles.
b. Mackensey met people with different ideas.
c. Mackensey learned to use different machines.
d. Mackensey found three brands included BHT.
e. Mackensey wondered what chemicals were in pet food.
A.c-a-d-e-b B.c-e-b-d-a C.e-c-a-d-b D.e-b-a-d-с
15.What would be the best title for the passage
A. The Pet Food B.A Teen Chemist
C. A Science Teacher D.A High School Lab
答案以及解析
一、单项选择
1.答案：B
解析：考查动词词义辨析。operate操作;compare对比;search搜索;watch观看。根据下句中的“Let me find their differences”可知，空格处表示compare“对比，比较”。故选B。
2.答案：C
解析：考查被动语态。—如果经常把孩子和别人比较,他们可能会有很大的压力。—我非常同意。每个人都很特别。从句的主语children和谓语动词compare之间存在被动关系,被动语态的结构为"be done"。故选C。
3.答案：A
解析：根据"Can you tell the differences "可知是比较两片树叶,故选A。
4.答案：C
解析：句意：熊猫很害羞，也很聪明。我们都喜欢他们。考查形容词辨析。friendly友好的； boring无聊的；cute有趣的；scary可怕的；shy害羞的；smart聪明的；ugly丑陋的；clever聪明的。根据“Pandas are very…and…We all like them.”可知，此处表达熊猫害羞，聪明，人们都喜欢他。故选C。
5.答案：B
解析：考查形容词辨析。句意:珍妮很害羞。当她说话时,她的脸经常变红。active 积极的;shy害羞的;interesting 有趣的;scary可怕的。根据下句“Her face often turns red when she speaks.”可知,空处应指害羞。故选B。
6.答案：C
解析：句意：这只鹦鹉会说话，而且它非常聪明。考查形容词辨析。scary吓人的；lazy懒惰的；smart聪明的；beautiful漂亮的。根据“The parrot can talk”可知，会说话的鹦鹉很聪明。故选C。
7.答案：C
解析：silent形容词,“沉默的”; loud形容词或副词,“大声的;大声地”;aloud副词,“大声地;出声地”;loudly副词,“大声地,吵闹地”。修饰动词read,通常用aloud,意为“读得大声”。故选C。
8.答案：D
解析：根据题干中的"吉姆将要出国留学"可推断,他希望他的朋友们能"出席"晚宴。attend意为"出席;参加",符合题意。
9.答案：A
解析：句意：——关于一个人，你首先注意到的是什么？——通常是他们的外貌。考查名词辨析。appearance外貌；外观，为不可数名词，通常不加复数。appearances不符合语法规则；appear出现，似乎，动词；appearing出现，现在分词。根据“their”可知，此处填名词形式，只有A选项符合。故选A。
10.答案：C
解析：句意：不要笑。这是一个严肃的问题。你真的想辞职吗？考查形容词辨析。friendly友好的；amazing令人惊异的；serious严肃的；funny搞笑的。根据“Don’t laugh.”及“Do you really want to leave your job ”可知，是否要辞职是个严肃的问题。故选C。
二、阅读理解
11.答案：D
解析：代词指代题。根据第一段中的“until her dogs started getting sick”和“Mackensey thought it might be because of the pet food. This made her want to know what chemicals(化学品) were in pet food”可知,这里“This”指代的是她的狗生病可能是因为宠物食品。故选D。
12.答案：C
解析：细节理解题。根据第三段中的“At first, she thought the brands wouldn't have any BHT because it was not listed on the package. However, she unexpectedly discovered… and Wellness included 0. 104%”可知, Mackensey 对实验结果感到惊讶的原因是她发现了比预期更多的 BHT。故选C。
13.答案：D
解析：推理判断题。根据文章中Mackensey自主进行实验研究,发现问题并提出解决方案的过程,可推断她是一个聪明、独立且执行力很强的人。故选D。
14.答案：C
解析：排列顺序题。解题步骤:研读选项一确定关键词短语一回文定位。Mackensey怀疑宠物食品中含有化学物质(e);然后,她在实验室学习使用不同的机器(c);接着,她阅读过去的研究文章(a);之后,她发现三种品牌中含有BHT(d);最后,她在科学展上遇到了很多不同想法的人(b)。正确的顺序为e-c-a-d-b。故选C。
15.答案：B
解析：标题归纳题。本文主要讲述了14岁的Mackensey Wilson出于对狗粮中化学成分的好奇,开展了一系列科学研究。通过实验,她发现了一些狗粮品牌中存在未标注的BHT防腐剂,并在科学展上分享了她的发现。故选B“一位青少年化学家”。

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