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——WhatshouldIdo,doctor——healthy,youshouldtakemoreexercise.A.KeepB.KeepingC.TokeepD.Havingkept,为什么?

题目详情
——What should I do ,doctor ——____ healthy ,you should take more exercise.
A.Keep B.Keeping C.To keep D.Having kept
,为什么?
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答案和解析
to keep healthy(to do)动词不定式作目的状语,表示为了.,这里指为了保持健康,你应该做更多的锻炼.