It seems oil ______ from this pipe for some time. We’ 11 have to take the machin

游客2024-08-13 1

问题 It seems oil ______ from this pipe for some time. We’ 11 have to take the machine apart to put it right.

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

答案 D

解析该句中时间状语for some time表明这个动作已进行了一段时间，而句中的谓语动词 seems和will have to take说明leak这个动作还在进行，可能还会延续下去，故需用现在完成进行时。

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Itseemsoil______fromthispipeforsometime.We’11havetotakethemachin