16. The little girl asked what _______ to her friend.
A. has happened
B. happened
C. had happened
D. would have been happened
17. John ______ a book when I saw him.
A. is reading
B. read
C. was reading
D. reading
18. He said he _______ return later.
A. will
B. would
C. can
D. would be
19. Jack ________ the door.
A. has just opened
B. open
C. have opened
D. opening
20. I have been waiting for you ______ .
A. since early morning
B. since 9 a.m
C. for two hours
D. All are correct
21. Almost everyone _______ for home by the time we arrived.
A. leave
B. left
C. leaves
D. had left
22. By the age of 25, he ______ two famous novels.
A. wrote
B. writes
C. has written
D. had written
23. When her husband was in the army, Mary ______ to him twice a week
A. was reading
B. wrote
C. was written
D. had written
24. I couldn’t cut the grass because the lawn mower ______ a few days previously.
A. broke down
B. has been broken
C. had broken down
D. breaks down
