仁爱科普版八上英语Unit 2 Topic3 Must we exercise to prevent the flu Section B 同步练习（含答案）

Topic3 Must we exercise to prevent the flu Section B同步练习
一、词汇练习
1. 写出下列单词的中文意思
prevent ____________
flu ____________
talk ____________
camera ____________
relax ____________
finish ____________
free ____________
busy ____________
2. 根据中文提示写出单词
必须 （must） ____________
我们 （we） ____________
锻炼 （exercise） ____________
忘记 （forget） ____________
自己 （oneself） ____________
3. 用所给单词的适当形式填空
You should do more exercise to keep ____________ (health).
It's necessary for us ____________ (wash) hands often.
We must prevent children from ____________ (play) with fire.
The doctor advised me ____________ (eat) more vegetables.
二、语法练习
1. 选择题
(1) You ________ watch TV too much. It's bad for your eyes.
A. shouldn't B. mustn't C. needn't
(2) You ________ do your homework first.
A. should B. must C. have to
(3) I did my homework, but I ________ finish it by myself.
A. couldn't B. can't C. shouldn't
(4) —Is Dad free today
—I'm afraid he is ________.
A. busy B. free C. OK
(5) You ________ do it yourself first.
A. had better B. would rather C. have to
2. 按要求完成句子
(1) We must exercise to prevent the flu. （改为一般疑问句）
________ we exercise to prevent the flu
(2) You should take your camera. （改为否定句）
You ________ take your camera.
(3) He can finish the work by himself. （改为否定句）
He ________ finish the work by himself.
(4) Must I do my homework now （作否定回答）
No, you ________.
(5) You had better stay at home. （改为否定句）
You had better ________ stay at home.
三、阅读理解
阅读下面的短文，然后回答问题。
Kangkang's father is going to give a talk about how to prevent the flu. Everyone in the class is very excited. They all want to know how to keep healthy. Kangkang's father tells them that they should wash their hands often, keep the room clean and do more exercise. They should also eat healthy food and get enough sleep. After the talk, the students know a lot about keeping healthy.
1. What is Kangkang's father going to do

2. Why is everyone in the class excited

3. What should they do to keep healthy

四、写作练习
请根据以下提示，写一篇关于如何保持健康的短文，不少于 60 词。
提示：
1. 经常锻炼，如跑步、游泳等。
2. 保持均衡饮食，多吃蔬菜和水果。
3. 早睡早起，保证充足的睡眠。
答案和解析：
词汇练习
1. 1. prevent 2. crowded 3. journalist 4. at once 5. enough
1. 2. ourselves 2. crowded 3. clean 4. fresher 5. not go
解析：1. build oneself up为固定搭配，意为“增强某人的体质”，这里用we的反身代词ourselves。2. 房间应是拥挤的，crowd的形容词形式为crowded。3. keep +宾语+形容词，表示“使……保持某种状态”，故用clean。4. 由than可知用比较级，fresh的比较级为fresher。5. had better not do sth. 意为“最好不要做某事”。
短语练习
1. 1. build up 2. all the time 3. keep away from 4. go to see a doctor at once 5. enough water
1. 2. 远离 2. 行，开始做 3. 采纳某人的建议 4. 一直 5. 患流感
解析：这些都是本单元的重点短语，需牢记其含义和用法，在平时的学习中多积累、多运用，以达到熟练掌握的程度。
句子练习
1. 1. Must；exercise 2. needn't 3. What should；do 4. Don't go
解析：1. 含有must的一般疑问句，将must提前即可。2. must的否定回答用needn't或don't have to。3. 对动作提问用what...do。4. had better not do sth.的祈使句形式为Don't do sth.。
1. 2. We should wash our hands and change our clothes often.
2. First, we should exercise often.
3. You must keep away from crowded places.
4. We needn't take some medicine to prevent the flu.
解析：这些句子都是对课本重点句子的考查，翻译时要注意单词的拼写、时态和语法的正确使用，以及句子的通顺性。
语法练习
1. 1. must 2. needn't 3. must 4. needn't
解析：1. must表示必须，语气较强，我们必须遵守交通规则，用must。2. needn't表示不必担心，符合语境。3. must表示必须完成工作。4. must的一般疑问句否定回答用needn't。
1. 2. A 2. B 3. A 4. A 5. A
解析：1. keep +宾语+形容词，保持教室干净，用clean。2. must的否定回答用needn't。3. had better not do sth. 最好不要做某事。4. keep +宾语+形容词，使窗户开着，用open。5. 根据文章内容，预防流感首先要经常锻炼，用first。
阅读理解
1. C 2. D 3. B 4. C 5. B
解析：1. 文中提到预防流感有五种方法，分别用First, Second, Third, Fourth, Fifth引出。2. 由文中First, we should exercise often to build us up.可知答案为D。3. 由文中If we have the flu, we must go to see a doctor at once可知答案为B。4. 拥挤的地方容易感染流感，所以要远离，答案为C。5. 文章主要讲述了如何预防流感，答案为B。
书面表达
To prevent the flu, we should do many things. First, we should exercise often. Second, we should keep our rooms clean and the air fresh all the time. Third, we should wash our hands and change our clothes often. Fourth, we should drink enough water and have a good rest. Finally, we should keep away from crowded places. If we do these, we can stay healthy and prevent the flu.