题目内容

---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
B
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。
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