单选题
What ______ if I had been asked to join, I cannot tell.
A、
would I have done
B、
would I do
C、
I would do
D、
I would have done
【正确答案】
D
【答案解析】
what引导的句子作I cannot tell的宾语，所以从句谓语不用倒装，而用原序。
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