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

答案D

解析 考查时态。根据seems和for some time判断应使用现在完成进行时。现在完成进行时强调在从过去到现在的时间里,动作或状态一直持续或一直反复出现。句意为“看来,这个管道漏油已有一段时间了,我们将不得不拆卸机器排除故障”。故选D。
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