It seems oil ______ from this pipe for some time. We’ll have to take the machine apart to put it right.

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问题 It seems oil ______ from this pipe for some time. We’ll have to take the machine apart to put it right.

选项 A、is leaking
B、had leaked
C、leaked
D、has been leaking

答案D

解析本句时间状语for some time表明这个动作已进行了一段时间，而句中的seems和will have to take说明leak这个动作还在进行，而且可能还会延续下去，故用现在完成进行时，因此D正确。

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专业英语四级

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It seems oil ______ from this pipe for some time. We’ll have to take the machine apart to put it right.

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