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

A.is playing

B.have played

C.are playing

D.play

答案及解析： A

解析：

当主语后面跟有as well as引导的词组时，其谓语动词的单复数数按主语的单复数而定.该句主语的中心词E-mail是第三人称单数，所以谓语动词也应用第三人称单数.动词短语play an important part意思是“起重要作用”，答案为A.例如：She as well as the other students has learned how to use this newdictionary.她和其他学生一样， 也学会了如何使用这本新词典.