If carefully, the experiment will be successful.A. doB. doesC. doneD. doing

发布时间：2020-08-17 12:19:41

If      carefully, the experiment will be successful.
A. do
B. does
C. done
D. doing

网友回答

A. do
B. does
(答案→)C. done
D. doing
解析：可视为if it is carefully done之省略。
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