2. 外语
  3. It seems oil______from this pipe for some time. We’ll have to take the machine apart to put it right.

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

admin2014-02-22  9
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、had leaked
B、is leaking
C、leaked
D、has been leaking
答案D
解析 现在完成进行时表示在一段时间内持续进行的动作，并对现在产生一定的影响。句意是，似乎石油从管道泄漏已有一段时间了。我们将不得不把机器拆开修理。所以正确答案是D选项。
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