we often send e-mail m____to our friends.是message 还是messages 希望做出解释.
2 I have not heard form my brother r_______.I am a little worried about him.
人气：258 ℃ 时间：2020-04-10 05:15:48
解答
1. messages因为e-mail是名词作定语用来修饰messages,一般名词作定语用单数形式
2. recently最近我没收到我哥哥的来信,我有点担心他
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