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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 容易
  • 浏览 629

It seems oil____from this pipe for some time, we’ll have to take the machine apart to put it right.

A.had leaked B.is leaking
C.leaked D.has been leaking
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Itseemsoilfromthispipeforsomet