题目内容
—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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题目内容
—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