28. Without facts, we cannot form a worthwhile opinion, for we need to have factual knowledge ____ our thinking. A. upon which to base B. which to base upon C. which to be based on D. to base on which ...

24. The long-awaited Hubble Space Telescope, ____to orbit the Earth next March, will observe some of the oldest stars in the sky. A. subject B. owing C. available D. due ...

20. Harold is a good student, ____ his best subject. A. as English B. English as C. being English D. English being ...

16. The boy slipped out of the room and headed for the swimming pool without his parents’____. A. command B. conviction C. consent D. compromise ...

11. He can't start the car because the battery has ____. A. run up B. run down C. run over D. run off ...

7. Difficulties and hardships have ____the best qualities of the young geologist. A. brought out B. brought about C. brought forth D. brought up ...

3. If you suspect that the illness might be serious you should not ____ going to the doctor. A. put off B. hold back C. put aside D. hold up ...

28. Lesson plans are useful only before the lesson. A. 错误 B. 正确 ...

10. Consonants vary depending on where and how the air stream gets through, the place and movement of the tongue, and also whether the voice is used or not. A. 错误 B. 正确 ...

46. Listening activities can only be conducted with the whole class. A. 错误 B. 正确 ...