It seems oil leaves from this pipe for some time. We’ll have to take the machine

游客2023-12-27 47

问题 It seems oil leaves from this pipe for some time. We’ll 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

解析时态应用本句意为：油管漏油好像有一段时间了，我们必须拆开机器排除故障。题干第2句表示将要采取的措施，意味着第l句话“漏油”(leak)的动作发生在过去某一时间，并且持续到现在为止仍在继续，因此第1句话应用现在完成时或现在完成进行时。因此D为答案。

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