10. My dog barks if it   ... any strange sound.
A. had heard B. heard C. hears D. was hearing
11. If he had gone to London yesterday, he........ his old friend. 
A. met B. will meet C. would have met D. would meet
12. If I...... in your place, I would accept Mr Anderson’s invitation.
A. was B. am C. had been D. were
13. If I were in your position, I....... the job.
A. will change B. would change C. would have changed D. had changed
14. Henry__________ a rich man today if he had been more careful in the past. 
A. will be B. would be C. had been D. would have been
15. If he hadn’t lost her phone number last night, he ..........her now.
A. could call B. will call C. would have called D. called
16. Lan enjoys watching TV after dinner,....... ?
A. does she B. doesn’t she C. didn’t she D. isn’t she
17. No one went to the meeting,....... ?
A. didn’t they B. didn’t he C. weren’t they D. did they
18. That is your umbrella, ......?
A. isn’t it B. isn’t that C. is it D. is that
19. The girl has listened to music for an hour,..... ?
A. isn’t she B. is she C. hasn’t she D. has she
20. Your father will go to his brother tomorrow,........ ?
A. didn’t they B. doesn’t he C. won’t he D. aren’t they