20. He _______ do the work with us. Let’s do it ourselves.

Keys:

19. _______ I get you some drink from the shop?

18. ------ Where ______ Jack be? I’ve been looking for him this morning.

　 ------ He _______ be in his office. The whole building is closed.

17. You ______ help him. He is in trouble.

16. Seeing her lovely face, all the students ________ help laughing.

15. ------ _________ I hand in the paper now?

　 ------ No, you ________. You ________ keep it if you like.

14. ------- ___________ I use the library this afternoon?

　 ------- No, you _________.

13. Mary had a bad cold. She _________ (not) have walked in the rain.

12. I haven’t decided where I’m going for my holidays. I _______ go to America.

11. ________ you please tell me the way to the supermarket?