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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 中等
  • 浏览 1823

When they saw their teacher        into the classroom, they stopped        at once.

A.walk; to talk B.walking; to talk
C.to walk; talking D.walking; talking
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Whentheysawtheirteacherintothe