21. --- Did he notice you enter the room?

　　--- I don’t think so. He ______ to the radio with his eyes shut.

　　A. listened B. was listening

　　C. has listened D. had listened

　　22. The plane ______ at 7:00 pm, so I have to be at the airport by 6:40 at the latest.

　　A. has left B. would leave

　　C. will have left D. leaves

　　23. The train ___ at the present speed until it reaches the foot of the mountain at about nine o’clock tonight.

　　A. went B. is going C. goes D. will be going

　　24. I used to drink a lot of tea but these days I ______ coffee.

　　A. prefer B. preferred

　　C. had preferred D. am preferring

　　25. The vegetables didn’t taste very good. They ______ too long.

　　A. had been cooked B. were cooked

　　C. have cooked D. cooked

　　26. --- Remember the first time we met, Jim?

　　--- Of course I do. You ______ in the library.

　　A. were reading B. had read

　　C. have read D. read

　　27. I want to buy that kind of cloth because I ______ the cloth ______ well.

　　A. have told; washes B. have been told; washes

　　C. was told; washed D. have been told; is washed

　　28. --- Is Tom still smoking?

　　--- No. By next Saturday he ______ for a whole month without smoking a single cigarette.

　　A. will be B. will have gone

　　C. will have been D. has been going

　　29. --- ______ Betty this morning?

　　--- Not yet, but she is sure to be here before noon.

　　A. Have you seen B. Will you see

　　C. Do you see D. Did you see?

　　30. Jim talked for about half an hour yesterday. Never ______ him talk so much.

　　A. I heard B. did I hear

　　C. I had heard D. had I heard

　　31. --- Look at the black clouds. It ______ soon.

　　--- Sure. If only we ______ out.

　　A. is raining; didn’t come B. is to rain; won’t start

　　C. will rain; haven’t started D. is going to rain; hadn’t come

　　32. He ___ articles for our wall-newspaper these three years, and he ____ about forty articles.

　　A. has been writing; has written B. has been writing; wrote

　　C. is writing; has been writing D. has written; has written

　　33. She ______ to the office than she got down to writing the report.

　　A. has no sooner got B. had hardly got

　　C. no sooner got D. had no sooner got

　　34. When he was alive, the old scientist used to say that knowledge ______ from practice and he gained his experience by doing a lot of practical work.

　　A. was coming B. had come

　　C. comes D. would come

　　35. --- Don’t forget to bring my new books tomorrow afternoon.

　　--- No, I ______.

　　A. don’t B. do C. won’t D. will