四川成人本科学位英语试题精讲：时态(2)

5. While the secretary____ his desk, he found the long lost report.
A. had been cleaning B. is cleaning C. has been cleaning D. was cleaning
【答案】D 首先是过去时，排除BC。然后并不强调完成，排除A。秘书在打扫桌子的时候，他发现了丢失已久的报告。
6. Smith is to study medicine as soon as he_____ military service.
A. will finish B. has finished C. finish D. would finish
【答案】B句意：一服完兵役，史密斯就要开始学习医学。此处as soon as 引导时间状语从句，从句中用一般现在时或者现在完成时表示将来，所以排除A和D；而如果用一般现在时，应该是finishes, 因此C项也不正确；所以选has finished,为现在完成时。
7. No one can be sure if the car on display fits him or her until he or she ___ them.
A. tries B. will try C. are trying D. have tried
【答案】：A。本题是测试考生的时态。在时间和条件状语从句中要用一般时表示将来的动作。因此A 是正确答案。又如：“They will go home for winter vocation as soon as they finish their exams. 他们一考完试就回家过寒假。”
8. Please be sure to telephone me the next time you____.
A. will come B. would come C. shall come D. come
【答案】D the next time you come 是时间状语从句，“下次你来的时候”，the next time 后一般用现在时表将来时。
9 You should visit this part of the country when ___