5 E-mail as well as telephone an important part in daily communication.A. is playingB.

问题补充：

5、E-mail, as well as telephone, an important part in daily communication.

A. is playing

B. have played

C. are playing

D. Hoped

答案：

(答案→)A. is playing

B. have played

C. are playing

D. Hoped

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