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  • 科目:英语
  • 题型:单选题
  • 难度:中等
  • 人气:648

—Look, the paint is starting to come off ______ the wall is damp.
—Well, we’d better have the wall repainted some day.

A.when B.once
C.if D.where
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—Look,thepaintisstartingtocome