The experiment shows that proper amounts of exercise, if __ regularly, can improve our health. A．bei...
2023-01-24 00:51:57 147次 2010年高考英语试题分类汇编连词和状语从句 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
The experiment shows that proper amounts of
exercise, if __ regularly, can improve our health.
|
A．being carried out
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B．carrying out
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C．carried out
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D．to carry out
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