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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 中等
  • 浏览 1637

Some children were seen _______in the garden all the morning. It must have been _______who picked the flowers.

A.playing; they B.to play; they C.playing; them D.play; them
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Somechildrenwereseeninthegarde