With the development of modern society, E-mail as well as telephones an important part in daily munication.
A. have played
B. is playing
C. are playing
D. had played
网友回答
A. have played
(答案→)B. is playing
C. are playing
D. had played
解析：句意，随着现代社会的发展，电子邮件和电话正在人们的日常交流中扮演着重要角色。表示现阶段正在进行的动作，用现在进行时；当主语后面有as well as短语时，谓语动词不受这些短语的影响，仍然与主语保持一致，主语是E-mail，故用is。