◎ 题干
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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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“The experiment shows that proper amounts of exercise, if __________ regularly,can improve our health.[ ]A.beingcarriedoutB.carryingoutC.carriedoutD.tocarryo…”主要考查了你对  【过去分词】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。