题目内容

E-mail, as well as telephone, ______ an important part in daily communication.
A.is playing B.have played C.are playing D.played
A
考查主谓一致。本题的谓语动词和E-mail保持一致,应该使用单数。本题没有出现过去时的时间状语,所以使用现在时。
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