E-mail Aas well as mobile telephones Bare becoming Cmore and morepopular Din daily communication.

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问题 E-mail Aas well as mobile telephones Bare becoming Cmore and morepopular Din daily communication.

选项 A、 
B、 
C、 
D、 

答案B

解析 真正的主语是E-mail,根据主谓一致原则,谓语用单数.应该改为is。
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