题目内容
-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
答案:C
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题目内容
-We have reached the stage ________ we have to give up the experiment.
-I'm sorry to hear that.
when
why
where
which