1. I can ___

2. Can you ___ tennis?

3. He ___ open the door, it’s stuck.

4. I ___ speak three languages.

5. When I lived in New York, I ___ walk to work in five minutes.

6. If you lose the key, you ___ get into your apartment.

7. The policeman says we ___ go in now.

8. ___ you please sit down!

9. They ___ have seen the warning sign.

10. You ___ come and see us tomorrow, ___ you?

11. I ___ finished the whole test if I’d had five more minutes.

12. I think they’ll get the contract, but they ___not.

13. Professor, ___ I ask a question?

14. A: Can he swim? B: Yes,___.

15. Alan can ___ well.

16. I ___ promise anything, but I’ll do what I ___.

17. Please let us know if you ___ attend the meeting.

18. Valuables ___ be left in the hotel safe.

19. We ___ finish the football match before it started snowing too heavily.

20. ___ understand Professor Larsen’s lecture? I found it really difficult.