18.－Where do you think ____ he ____the computer?

　 －Sorry. I have no idea.

　 A. has ; bought　 B. 不填; bought　 C. did; buy　　　 D.不填； buys

17.I used to drink a lot of tea but these days I _____ coffee.

　 A. prefer　　 B. preferred　 C. had preferred　 D. am preferring

16.－OH, Dear. I forgot the air tickets.

　 －You ______something.

　 A. have left　 B. are always leaving　 C. are leaving　 D. always left

15.－I saw Dave in the lift this morning.

　 －Really? He______ around here for a long time.

　 A. won’t be　 B. wasn’t seen　　 C. hasn’t been seen　　 D. hadn’t been seen

14.Cars moved very slowly in the 1930s but they _____faster than in the 1920s.

　 A. were moving　 B. did move　　 C. had moved　　 D. would move

13. The company ___________ a rise in salary for ages, but nothing has happened yet.

A. has been promising　　　　 B. has promised

　　 C. promised　　　　　　　　 D. promises

12.The computers made by our company sell best, but several years ago no one could imagined the role in the markets that they____________.

　 A. were playing　 B. were to play　　 C. have played　 D. played

11.－Got your driving license?

－No .I　　　　　 　too busy to have enough practice, so I didn’t take the driving test last week .I’m going to next week.

　　　 A．was B．have been C．am　　 D．had been

10.－I haven’t seen you for ages. Where have you been ?

－I 　　　　　on leave in Europe.

　 A. have been　　 B. am　　　　　 C. was　　　　　 D. had been

9.The price ___, but I doubt whether it will remain so.

　 A. went down B. will go down C. has gone down D. was going down