---Why haven’t you asked her to come here?---She an important experiment when I found her

问题补充：

---Why haven’t you asked her to come here?

---She an important experiment when I found her and she it.

A. had done; didn’t finish

B. was doing; hasn’t finished

C. did; wouldn’t finish

D. has done; hadn’t finished

答案：

A. had done; didn’t finish

(答案→)B. was doing; hasn’t finished

C. did; wouldn’t finish

D. has done; hadn’t finished

解析：你为什么没让她来这里呢？ 可以判断她没有来。她还在做实验 所以她还做完实验， she hasn’t finished it. 对现在产生了影响，而且还没有完成，所以用现在完成时。当我找到她的时候，她在做实验。过去进行时的概念。