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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 较易
  • 浏览 1567

In those days, we had no phones, so we had to keep in touch ________ letters often.

A.with B.of C.on D.through
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Inthosedays,wehadnophones,sowe