根据每句话的意思以及首字母填入恰当单词，使得句意连贯。

1. I can't afford this car because it is too e___________. 　　

2. Listen to me carefully. I'll e_________ the rules of the game. 　　

3. Can you e_________ yourself in English? 　　

4. Her father is a worker and he works in a f____________. 　　

5. Jackie Chen is f____________ as a movie star. 　　

6. There are many sheep on this f_________. 　　

7. The mother is f_________ the baby. 　　

8. Chinese are enjoying the Spring F____________. 　　

9. May is the f________ month of the year. 　　

10. Students often f___________ doing homework at night.

一头小牛重200千克，5头同样重的牛共重（    ）吨。