3. Whenever you    a present, you should think about it from the receiver's point of view.

A. bought       B.  have bought

C. will buy        D. buy

2. Since the time humankind started gardening, we    to make our environment more beautiful.

A. try          B.  have been trying

C. are trying     D.  will try

1. 一What time is it?

―I have no idea. But just a minute I    it for you.

A. check       B. checked

C. will check    D.  would check

9. ―Lucy, how are you getting on with your composition?

―I have rewritten it so many times that I wonder if I    it.

A. finish         B. finished

C. have finished   D.  will finish

11. ―Alas ！ I have left my key to the office in my car.

―Don't worry. I     it for you. Wait a minute.

A. get     B.   am going to get

C. will get   D.  am getting

12. ―Isn't it easy for her to get trapped in heavy traffic while driving to work?

―Yeah, that is why she     to work by subway every day.

A. has gone       B.  has been going

C. was going     D.  will have gone

13. ―The road repairs   on 7th Avenue.

―OK. We'll take Park Avenue then.

A. are carrying out        B. have been carried out

C.  have carried out      D. are being carried out

20. Our manager   for Shanghai in a few days and he has asked me to find out when the earliest plane       next Wednesday. 

A.    is leaving; takes off

B.    is leaving; is taking off

C.    leaves; takes off

D.    leaves; is taking off

14. ―Why    so early? The movie doesn't start till seven.

―I don't want to be at the traffic there. It's terrible during the rush hour.

A. have you left        B.  do you leave

C. would you leave      D.  are you leaving

19. Tom,   you play the violin so well. But I

you can play the violin.

A. didn't know       B. don't know

C. hadn't known       D. haven't known