1 Years ago,we did not know this,but recent science ___ that people who don't sleep well soon get ill.
A showed B has showed C will show D is showing
答案是B,为什么不是A?
2. The year 2002 ___ remarkable changes in shanghai's landscape.
A sees B has seen C saw Dhad seen
答案是C,请解释并翻译一下。
3. I would have finished the work more quickly,but I ____ that you were waiting.
A. hadn't known B. wouldn't known C. haven't known D. don't known
答案是A,Why?
4. Because the shop ___ , all the T-shirts are sold at half price.
A . has closed down B. closed down C is closing down D. had closed down
答案是C,为什么呢?
5. The dission _____ alive when an interesting topic was brought in.
A was coming B. had come C has come D. came
答案是D,问什么A 不对。
6.Now that she is out of job,Lucky ___ going back to school,but she hasn't decided yet.
A . had considersd B. has been considering
C.considersd D.is going to considER
答案是B. C 哪错了?
——What are you going to do this afternoon?
——I'm going to the cinema with som friends. The film ___ quite early, so we _____ to the bookstore after that.
A. finished ; are going B. finished; go
C.finishes; are going D. finishes; go
答案是C, 第二空“so we are going to the bookstore” 我觉得应该是"so we are going to go to the bookstore".对不?
7. Under more favorable conditions,we _____ better.
A. could be done B. could have done C. should do D. needn't have done
答案是B, 我选了C。
谁帮我回答一下啊