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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 容易
  • 浏览 560

The children are having a good time, ______ with sand, others with toys.

A.some of them playing B.some of them are playing
C.some of them D.who playing
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Thechildrenarehavingagoodtime,