Unit 13 We're trying to save the earth!第一课时Section A (1a-2d) 分层作业（含答案）

Unit 13 We’re trying to save the earth!
第一课时Section A (1a-2d)
基础训练
Ⅰ. 根据首字母及汉语提示补全单词
1. There is much rubbish at the b________ of the river near our home.
2. It is a very clean city. You will hardly find l______ when you walk along the street.
3. My uncle is a great f______ and he caught four fish this morning.
4. We should use cloth bags instead of ________(塑料) bags.
5. Don’t laugh at the ________(难看的) picture. After all, it was painted by a five year old boy.
Ⅱ. 用括号内所给单词的适当形式填空
1. The environment ___________ (pollute) is more and more serious.
2. The ___________ (important) of the safety should be known by every child.
3. The air is ________ (bad) polluted because there are too many cars now.
4. The box is ___________ (wood). It’s too heavy for her to carry.
5. Her _____(act) tell us a lot about her purposes.
Ⅲ. 根据汉语意思完成句子
1. 互联网在我们的日常生活中发挥着重要作用。
Internet ___________________important ___________________our daily life.
2. 大量的工作和过少的休息会引起疾病。
A lot of work and too little rest often ___________________ illnesses.
3. 我们应该把垃圾扔进垃圾箱。
We should ___________ rubbish _______ the bins.
4. 从十岁起，李雷就参加了保护动物的活动。
Li Lei has _________________________________ animals since he was ten.
5. 工人们正在竭尽全力降低事故率。
The workers are doing all they can ______________ the accident rate.
Ⅳ. 单项选择
( )1. —What’s the ________ of traveling by bike
—It can save money, keep healthy and not pollute the air.
A. courage B. experiences C. advantages D. knowledge,
( )2. You’d better ride a bike to go to school ________ taking the bus every day.
A. out of B. instead of C. thanks to D. because of
( )3. —This dress looks beautiful on you. How much is it
—It ________ me more than five hundred yuan.
A. spent B. paid C. took D. cost
( )4. Jason ________ enjoy playing games on the Internet, but now he loves playing soccer.
A. got used to B. used to C. was used to D. is used to
( )5. —I like eating vegetables.
—That’s a good habit. It ________ your ________.
A. is good for; healthy B. is good at; health
C. is good at; healthy D. is good for; health
能力提升
Ⅰ. 从方框中选择恰当的选项补全对话，有两项多余
A: Would you like to help save the environment
B: I don’t know. 1._________
A: First, you can start by turning off the lights.
B: Yes. That’s easy. 2.__________
A: Second, you can ride a bicycle. Don’t take a bus or a taxi if you don’t have to.
B: That will save money, too. 3.__________
A: Third, try to recycle paper.
B: Mm. newspapers, magazines, mail … we get a lot of paper at home. 4.________
A: The fourth idea is turning off the shower when you are not using it.
B: You mean, when I have shampoo in my hair
A: Yes. Get wet. Turning off the shower. Put in the shampoo in your hair and then turn on the shower and wash it out.
B: 5.________
A: Yes. We have to save water.
A. Will that help save the environment
B. What else
C. When will you go there
D. What’s next
E. What can I do
F. Do you have any plans for it
G. Good idea.
Ⅱ. 在空白处填入一个适当的词，或填入括号中所给单词的正确形式
To understand why the earth is warming up, 1.________(one) of all, we need to understand why it is warm. Our planet 2.________(cover) with atmosphere (大气). Sunlight passes 3.________ the atmosphere and reaches the earth. The sun heats up the 4.________(earth) surface. When the heat rises into the air, it is stopped by some special gases in the atmosphere like CO2, the heat returns to the earth and keeps 5.________ warm.
Power stations and cars release (释放) so 6.________ greenhouse gases every day. So we can help stop global (全球的) warming by using fewer electric things such as 7.________(turn) off lights when we leave a room, or asking our parents to turn down the heating in our house 8.________(save) energy. We can also stop global warming by finding other 9.________(way) of transportation. For example, riding a bicycle or walking instead of going by car. Another way to help stop global warming is to plant and care for trees. 10.________ trees take in CO2, they are our best friends when fighting against global warming.
巩固拓展
面对空气污染，我们应该怎么做？（英语）
参考答案
基础训练
Ⅰ. 1. bottom 2. litter 3. fisherman 4. plastic 5. ugly
Ⅱ. 1. pollution 2. importance 3. badly 4. wooden 5. actions
Ⅲ. 1. plays an; part in 2. leads to 3. throw; into 4. played a part in protecting 5. to cut down
Ⅳ. 1-5 CBDBD
能力提升
Ⅰ. 1-5 EDBGA
Ⅱ. 1. first 2. is covered 3. through 4. earth’s 5. it
6. many 7. turning 8. to save 9. ways 10. Because
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