Coughing also be used for social reasons, such as the coughing before giving a speechA.

发布时间：2020-08-16 18:54:41

Coughing      also be used for social reasons, such as the coughing before giving a speech．
A. may
B. should
C. must
D. need

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(答案→)A. may
B. should
C. must
D. need
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