E-mail,aswellastelephones,    ▲    animportantpartinda...

问题详情：

 E-mail, as well as telephones,     ▲     an important part in daily communication.

A. is playing                             B. have played        

C. was playing                                  D. play

【回答】

A

知识点：动词时态与语态

题型：选择题