30. In warm weather fruit and meat ________ long.

A. don’t keep　　　　　　　　　　　 B. can’t be kept

C. are not kept　　　　　　　　　　 D. aren’t keeping

29. ―Was the doctor there when you arrived?

　 　―Yes, but he ______ out a moment later.

　　 A. had gone　　　　　　　　　　 B. has gone

C. went　　　　　　　　　　　　 D. is going

28. ―Why? Where is the key to the sound lab?

　 ―Dear me! You _______ it in the taxi！

　　 A. have never left　　　　　　　　　 B. never left

C. haven’t left　　　　　　　　　　 D. didn’t leave

27. ―________ for Beijing?

　 ―Yes. And I’ll come back in three months.

　　 A. Have you left　　　　　　　　　　 B. Are you leaving

C. Do you leave　　　　　　　　 D. Did you leave

26. ―What were you doing when I called you yesterday afternoon?

　 ―I ________ my homework and I was starting to take a bath.

　　 A. had just finished　　　　　　　　　　 B. was finished

C. have already finished　　　　　　　　 D. was going to finish

25. My money_____, I must go to the bank to draw some of the savings out before I have none in hand.

　　 A. has run out　　　　　　　　　　　 B. has been run out

C. is running out　　　　　　　　　 D. is being run out

24. ―Twenty dollars, please!

　 ― How terrible!―I ________ to bring my wallet with me.

　　 A. was forgetting　　　　　　　　　 B. forgot　

C. had forgotten　　　　　　　　　　 D. am forgetting

23. ―What’s the matter? You look worried and restless.

　　 ―Oh, nothing really serious. As a matter of fact, I ______ of my graduation thesis. I have to hand it in soon.

　　 A. am just thinking　　　　　　　　 B. just thought

C. have just thought　　　　　　　　 D. was just thinking

22. ―What about 10 o’clock tomorrow morning?

　 ―I’m afraid I can’t make it. I _________ then.

　　 A. am going to take an exam　　　　 B. am taking an exam

　　 C. will be taking an exam　　　　　 D. an to take an exam

21. ―Do you have anything to do this afternoon?

　 　―What’s up?

　　 ―Let’s go shopping. It’s said that Jinying Shop _____, and all the sweaters are sold at half price.

　 　―Why not?

　　 A. has closed down　　　　　　　　　 B. was closing down

C. closes down　　　　　　　　　 D. is closing down