The experiment shows that proper amounts of exercise, if _____ regularly, can improve our health. A．...
2022-12-15 09:58:10 16次 2014届黑龙江哈尔滨第六中学高二下期中考试英语卷（解析版） 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 B．carrying out C．carried out D．to carry out
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