未知题型

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

A. We’ll have to take the machine apart to put it right.

【参考答案】

D
看上去油已经从这个管道里漏了一段时间了。我们得把机器拆开来把它的位置摆正。
持续的一段动作，并且现在......

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未知题型

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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.A) had leaked B) is leaking C) leaked D) has been leaking