Unit 3 第2课时 同步练习

Unit 3 Care for the Earth

第二课时

一、单项选择。

(　　)1. This is __________ new school. 

A. we　　　　　　 B. our　　　　　　 C. us

(　　)2. — __________  

— Because I have a toothache.

A. When do you see the doctor?

B. How do you see the doctor?

C. Why do you go to see the doctor?

(　　)3. We __________ make the air dirty. 

A. should B. shouldn't C. don't

(　　)4. — Let's go out to play, Su Nan.

— I'm sorry, I __________ do my homework first. 

A. have to B. can C. don't

(　　)5. We should do __________ for our earth. 

A. something B. some C.what

二、看图, 用We should … 或We shouldn't … 写句子。

1.  ______________________________________________

2.  ______________________________________________

3.  ______________________________________________

4.  ______________________________________________

5.  ______________________________________________

答案：

一、1. B　2. C　3. B　4. A　5. A 

二、1. We shouldn't cut down trees.

2. We shouldn't pick flowers.

3. We should plant more trees.

4. We shouldn't waste water.

5. We should care for the animals.