题目内容
_________, the experiment is sure to succeed.
A. If carefully doing B. If carefully done
C. If it done carefully D. If it doing carefully
【答案】
B
【解析】
试题分析:考查非谓语动词。从四个选项可知,此题考查非谓语做状语,动词do和句子主语experiment之间是被动关系,所以排除A、D选项。而C选项中有主语但是谓语不完整,故B选项正确。属于连词+分词形式,此处也可以看做是if it is carefully done的省略。句意:如果认真做的话,这个实验肯定能成功。
考点:考查非谓语动词。
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