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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 较易
  • 浏览 1748

“Look at these tracks. It _______ be a wolf.” “Don’t be so sure. I think it _______ be a fox.”

A.must; could B.may; might
C.need; must D.could; need
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Lookatthesetracks.Itbeawolf.Do