单选题
-- 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, hash' t finished
C、
did, wouldn' t finish
D、
would do, hasn' t finished
【正确答案】
B
【答案解析】
[解析] 本句意为：——你为什么没叫她到这里来啊?——我找到她的时候她正在做一个重要实验，到现在还没做完。后面是用when引导的时间状语，故前面需要用过去进行时态。and后面的句子是表示其对现在的影响，需用现在完成时态。
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