题目列表(包括答案和解析)
---We have reached the stage _________ we have to give up the experiment.
---I’m sorry to hear that.
A. when B. why C. where D. which
－We have reached the stage ________ we have to give up the experiment．
－I'm sorry to hear that．
when
why
where
which
－We have reached the stage ________ we have to give up the experiment．
－I’m sorry to hear that．
when
why
where
which
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