_morning_ good for our h...

_________morning_________ good for our health.

A.Do；exercise isB.Do；exercises is

C.Doing；exercises areD.Doing；exercises is

D 【解析】试题分析：句意：做早操有益于我们的健康。Exercise作“运动、锻炼”解释时是不可数名词，但作“体操”解释时要用复数式。动名词短语作句子主语时谓语动词要用三单形式。所以选D。考点：考查主谓一致。

考点分析：

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_________morning_________ good for our h...