写出下列词语的完全形式。
1. it’s _________ 2. I’m _____________ 3. who’s ___________
4. that’s ____________ 5. let’s _____________ 6. you’re __________
7. there’s ___________ 8. there’re ____________ 9. isn’t ___________
10. aren’t ____________
阅读短文选择填空。
We should ________ more trees. We ______ cut down too many trees. We should stop factories from pouring （倾倒）_____ water into rivers. We should save ______. We should not drive too much. We can go to work or school by bus or ____. We can reuse paper and plastic bags. We can make the world a better（更好）place.
（1）A. water B. plant C. buy
（2）A. can B. should C. shouldn’t
（3）A. dirty B. clean C. much
（4）A.trees B. energy C. water
（5）A. by taxi B. by car C.on foot
选择填空。
（1）We can ___________ to school.
（2）We can __________ form our city.
（3）We can ____________, they help keep the air clean.
（4）My grandpa doesn’t like ___________, because he’s a farmer.
（5）______________ makes the air dirty.
根据上下文，补全对话。(12分)
A: Look our classroom.
B: Oh, it is very dirty.
A: Let’s keep our classroom .
B: All right. I can the rubbish the bin.
C: I can the floor with Lily.
D: I can the desks and chairs.
A: Good idea. Let’s start.
B&C&D: OK!
选出正确的答句。(10分)
听录音，补全短文。(10分)
Our city ______ messy and ______ because of the ______ and rubbish. To keep the city ______, we should do our best. We can take the bus or ______ to school every day. We can put rubbish in the ______. We can ______ ______ trees. They ______ keep the ______ clean.