◎ 题干
The experiment shows that proper amounts of exercise, if         regularly, can improve our health. 
A.being carried out B.carrying outC.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.being carried out B.carrying outC.carried out D.to carry out…”主要考查了你对  【现在分词的被动式】【现在分词】【不定式的被动式】【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。