6.are playing7. won’t pass8. making 9. is used10.to understand

1.research2. reasonable 3.live　 4. caused 5.feeding

20. 你最好乘火车。

You'd _______ ______ a train.

19.他从小就对数学感兴趣。

He became ________ in maths when he was ________.

18. 他和我都不是老师。

______ he _______ I am a teacher.

17. 直到妈妈回来时，他才完成作业。

He ______ finish his homework _______ his mother came back.

16. 我用了两个小时修车。

It _______ me two hours _______ _______ the bike.

15. You don't need to look______ every new word in your dictionary while reading.

A. for 　B. at 　　C. after 　D. up

14. ---Look! The bus is coming.

---But it's full of people. We can't________ it.

A. get off 　B. get down 　C. get on with 　D. get on

13. It takes us________ hour or more to go to my hometown by______ train. 　A. an; a B. a; an 　C. an; 不填 　D. a; 不填