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---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

你為什么沒讓她來這里呢？可以判斷她沒有來。她還在做實驗所以她還做完實驗， she hasn’t finished it. 對現在產生了影響，而且還沒有完成，所以用現在完成時。當我找到她的時候，她在做實驗。過去進行時的概念。

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