it seems oil_____from this pipe for some time ,we'll have to take_英语解答

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
我选C错了,请问我错在哪了?

人气：161 ℃　时间：2019-10-17 02:32:52

解答

D
for some time表示动作持续一段时间用现在完成进行时

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