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

发布时间：2020-08-16 12:03:36


     your hand over your mouth when you cough.
A. Put
B. Putting
C. To put
D. To be putting

网友回答

(答案→)A. Put
B. Putting
C. To put
D. To be putting
解析：“咳嗽时用手捂住嘴。”因为已经有连词when，所以用祈使句。答案A。
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