Unit 13 We're trying to save the earth!Section A (3a-3b) 复习练习题（含答案）

Unit 13 Section A (3a-3b)
一、根据汉语提示补全单词
1. Drinking too much juice can be　　(有害的) to people’s teeth.
2. We should　　(培养) students’ ability to solve problems.
3. Some　　(法律) in our country were made to protect the environment.
4. I’m afraid we aren’t able to　　(买得起) a new car at the moment.
二、根据句意用所给词的适当形式填空
1. The　　(danger) animals should be better protected so that future generations could still see them.
2. This city is facing more and more　　(environment) problems.
3. The　　(science) research shows that whales use sound to communicate with each other.
4. Tea　　(bring) to Western countries in the 19th century.
三、单项填空
1. Teenagers nowadays are easily lost in the computer games,　　　　the boys.
A.especially B.nearly C.really D.hardly
2. We　　　　try our best to fight against pollution.
A.should B.may C.mustn’t D.needn’t
3. It is said Zhang Sanfeng created Tai Chi(太极) after watching a fight between a snake and a bird.　　　　,many movements in Tai Chi have names of animals.
A.In danger B.In total C.In time D.In fact
4. The number of the students in our school　　　　in the last few years.
A.falls B.fell C.has fallen D.have fallen
5. We’re not very close friends　　　　we’ve known each other for a long time.
A.until B.although C.as D.if
6. — My sister has got a job in the biggest company in our city.
— 　　　　. She’s always excellent.
A.You’re joking B.You’re right C.That’s fantastic D.That’s interesting
四、从方框中选单词并用其适当形式填空
industry, shark, ecosystem, danger, south
1.This is an　　　　 animal. We should try to save it.
2.We saw two 　　　　in the wild zoo. They are large and have sharp(尖的) teeth.
3.More and more robots are used in 　　　　.
4.Hainan is in the 　　　　part of China.
5.Sharks are at the top of the food chain in the ocean’s 　　　　.
五、根据汉语意思完成句子
1.他的中指工作时不小心被机器切掉了。
His middle finger 　　　　accidentally 　　　　　　　　by the machine while working.
2.事实上,它将给所有的海洋生物带来危害。
　　　　 　　　　, it will 　　　　danger to all ocean life.
3.记住我们是食物链的一部分。
Remember that we are part of the　　　　 　　　　.
4.据说转基因食品对人类健康有害。
It’s said that the GMF 　　　　　　　　　　　　human health.
5.长颈鹿能够到树顶的叶子。
A giraffe can reach the leaves 　　　　　　　　　　　　　　　　the trees.
答案：
一、
1. harmful
2. develop
3. laws
4. afford
二、
1. endangered
2. environmental
3. scientific
4. was brought
三、
1-6 AADCB C
四、
1.endangered　
2.sharks　
3.industry
4.southern　
5.ecosystem
五、
1.was; cut off　
2.In fact bring
3.food chain　
4.is harmful to/is bad for
5.at the top of