题目内容
_____many times, they succeeded _________ the experiment.
A. Having tried; in doing B. Tried; in being done
C. Having tried; to do D. Tried; doing
A
解析:
略
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题目内容
_____many times, they succeeded _________ the experiment.
A. Having tried; in doing B. Tried; in being done
C. Having tried; to do D. Tried; doing
A
略