by的用法之一
表示用交通工具、通讯工具后接名词单数,不加冠词.
选吧D
i often have conversations with John by __ E-mail,while i keep in touch with tom over __ telephone.
i often have conversations with John by __ E-mail,while i keep in touch with tom over __ telephone.
A the the B an the C the a D / the
A the the B an the C the a D / the
英语人气：718 ℃时间：2019-12-12 02:49:31
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