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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 容易
  • 浏览 849

The children ______ very quiet; I wonder what they ____up to.

A.were; are being B.are being; are C.are; do D.are being; do
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Thechildren______veryquiet;Iwo