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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 中等
  • 浏览 921

----- How about the book you are reading now?
----- Excellent indeed. You can find many problems we have come across _____ in it.

A.covered B.covering C.are referred D.referred
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Howaboutthebookyouarereadingno