题目内容
If _____ carefully, the experiment will be successful.?
A. do B. does C. done D. doing?
C
解析:
可视为if it is carefully done之省略。?
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题目内容
If _____ carefully, the experiment will be successful.?
A. do B. does C. done D. doing?
C
可视为if it is carefully done之省略。?