B) 用括号中所给词的正确形式填空。

9. We ______________ (ask) to do our homework carefully every day.

10. There are many clubs here, so choose ______________ (wise) and carefully.

11. We can save energy by _________________ (turn) off the lights when we leave a room.

12. The shoe factory is our city’s biggest _______________ (pollute).

13. --- When shall we go to watch the basketball match in the sports centre?

   --- Not until the work _________________ (finish) tomorrow.

14. Can you find any _______________ (different) between the two pictures?

15. --- ______________ you _____________ (hand) in the report yet?

   --- Yes, I put it on your desk shortly after lunch.

VI. 完成句子。（共5小题；每小题2分，满分10分）

1. 为了过绿色生活，我们应该做什么？

  What should we do ______________________________?

2. 我过去常常乘地铁去上班。

I ____________________________ to school.

3. 太多的车辆会导致严重的空气污染。

Too many cars can __________________________.

4. 政府已经制定了很多法律以保护环境。

The government has _______________________________.

5. 作为一个青少年，你应该学会自力更生。

As a teenager, you should learn to _______________________.