15、Li Ming often 　　　　　 (listen) to the radio in the morning.

14、They will have a trip　 to the Great Wall if it 　　　　　 　　(not rain) tomorrow.

13、Mr. Yu 　　　 (teach) us maths since 1982.

12、　　　　　　 (be) your parents in Shanghai last year?

11、Listen! Who 　　　　　　 (sing) in the next room now?

10、They usually 　　　　　　 　　(do) their homework after supper.

9、If it 　　　　　　　 　　an interesting film, we’ll see it tomorrow. (be)

8、It 　　　　　 　(take) him half an hour 　　　　 (finish) his homework yesterday.

7、I’m sorry to keep you 　　　　　　　 　　for a long time. (wait)

6、The boy asked his mother 　　　　　　　 him go and play basketball.(let)