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your hand over your mouth when you cough. A.PutB.PuttingC.To putD.To be putting

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your hand over your mouth when you cough. A.PutB.PuttingC.To putD.To be putting

______ your hand over your mouth when you cough.

A.PutB.Putting
C.To putD.To be putting

试题答案

A

解析