18.　 ______ by a greater demand of vegetables, farmers have built more green houses.

　 　A. Driven　　 B. Being driven　　　 C. To drive　　　 D. Having driven

17. .--- He got his first book published. It turned out to be a bestseller.

　 --- When was _____?

　 　--- _____ was in 2000 when he was still in college.

　　A. that; This　　　　 B. this; It　　　　 C. it; This　　　　 D. that; It

15.　 It _____ we had stayed together for a couple of weeks ____ I found we had a lot in common.

　　A. was until; when　 B. was until; that　　 C. wasn’t until; when　　 D. wasn’t until; that

.16.　 　--- My cat’s really fat.

　 　--- You ______ have given her so much food.

　 　A. wouldn’t　　　　 B. couldn’t　　 　　C. shouldn’t　　　　 D. mustn’t

14.　 Many of them turned a deaf ear to his advice, _______ they knew it to be valuable.

　　A. as if　　　　 B. now that　　　 C. even though　　　 D. so that

13.　 --- Look! He’s running so fast!

　 　--- Hard to _______ his legs were once broken.

　 　A. know　　　 　B. imagine　　　 C. realize　　　 D. find

12.　 --- Jack bought a new mobile phone the other day.

--- ________? That’s his third one in just one month.

A. Had he　　 B. Did he　　　 C. Does he　　　 D. Has he

11.　 -When I called you this morning, nobody answered the phone. Where______.

A. did you go 　　　　　　　 B. have you gone　 C. were you 　　　　 D. had you been

10.　 -Do you have any idea what Paul does all day?

-As I know, he spends at least as much time playing as he _______.

A. writes　　　　　　　　　　　 B. does writing　　　 C. is writing　　　　　 D. does write

9.　 She’s having a lot of trouble with the new computer, but she doesn’t know whom to _______.

A. turn to 　　　　　　 B. look for　　　　　　 C. deal with　　　　　 D. talk about

8.　 -What do you think we can do for our aged parents?

-You ________ do anything except to be with them and be yourself.

A. don’t have to 　　　　　 B. oughtn’t to　　　　 C. mustn’t　 　　　　 D. can’t