1. He can…at the problem alone.

a) to work; b) be working; c) work.

2. I am sorry…late yesterday.

a) to come; b) to have come; c) have come.

3. The teacher lets his students…at lessons.

a) to speak; b) to have spoken; c) speak.

4. You should…tests now.

a) write; b) be writing; c) to be writing.

5. Nick saw the cat…the tree.

a) climb; b) to climb; c) be climbing.

6. You'd better…about it.

a) To think; b) to be thinking; c) think.

7. Would you like…a little?

a) to dance; b) dance; c) have danced.

8. The rule is difficult… .

a) To understand; b) to be understood; c) be understood.

9. I'd rather…this book.

a) To buy; b) buy; c) be bought.

10. I am happy…by my friends.

a) visit; b) to visit; c) to be visited.

11. I could…you at the lesson.

a) to help; b) helping; c) help.

12. He seems…now.

a) To be reading; b) to have read; c) to read.

13. He didn't expect…to the exhibition.

a) being taken; b) to take; c) to be taken.

14. He is glad…to the party.

a) to have invited; b) to have been invited; c) to be invited.

15. As a child Ted used…his bike every day.

a) to be riding; b) ride; c) to ride.

16. On the way home I stopped…a newspaper.

a) buy; b) buying; c) to buy.

17. Remember…the dog before you leave.

a) feed; b) to feed; c) about feeding.

18. He is too young…

a) Getting tired; b) get tired; c) to get tired.

19. I am happy…with you for an hour.

a) to speak; b) to have been speaking; c) to be speaking.

20. English should…to regularly.

а) listen; b) to listen; c) be listened