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  • 科目:英语
  • 题型:单选题
  • 难度:中等
  • 人气:1294

—Look, there_____ many birds around here, but now we hardly see them. What a pity!
—Yeah! The air pollution has caused the problem!

A.are B.used to have C.used to be D.use to be
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—Look,theremanybirdsaroundhere