4.　　　 I _________(lose) my watch . I can’t remember when I _______(put) it .

3.　　　 --- ______the old man _______( water) the flowers every day?

--- Certainly. It _______(take) him much time _______(do) the job.`

2.　　　 ---When _______ you _______(join) the League? --- In 1999.

1.　　　 They _________ (get) to know each other many years ago.

16. stop ___________　　 17. study __________　　 18. chat _________

13. keep __________　　 14. hurt ___________　　 15. write ________

10. fall ____________　　 11. fly ___________　　 12. cost _________

7. take____________　　 8. know __________　　 9. tell _________

4. think___________　　 5. teach___________　　 6. catch________

1. become_________　　 2. begin__________　　　 3. give________