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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 中等
  • 浏览 760

Though they are very busy every day, they manage to get tighter_______.

A.by and by B.now and then C. all the time D.more or less
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Thoughtheyareverybusyeveryday,