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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 中等
  • 浏览 830

People         write letters to friends and relatives, but now WeChat and QQ communicating with others widely.

A.used to; are used to
B.are used to; are used for
C.used to; are used for
D.are used to; used to
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相关知识点

Peoplewriteletterstofriendsand