题目内容
To succeed in doing an experiment,________.
carefulness is needed B.carefulness is one needs
C. one needs to be careful D.one need be careful
C
解析:
主句没有主语,而D项时态不合。
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题目内容
To succeed in doing an experiment,________.
carefulness is needed B.carefulness is one needs
C. one needs to be careful D.one need be careful
C
主句没有主语,而D项时态不合。