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11. Before going to school yesterday, I (not have) ................................breakfast.

12. The dog was dirty. They (not wash) ................................it for weeks.

13. They (come)................. back home after they (finish)..................... their work.

14. She said that she (meet)......................... Mr.Bean before.

15. Before he (go)................................ to bed, he (read).............................. a novel.

16. He told me he (not/ wear).............................. such kind of clothes before.

17. When I came to the stadium, the match (start)........................................

18. Before she (listen)....................... to music, she had done her homework.

19. Last night, Peter (go)....................... to the supermarket before he went home.

20. When I got up this morning, my mom (already go)..................................... .