2. 外语
  3. It seems that oil ______from this pipe for some time. We will have to take the machine apart to put it right.

It seems that oil ______from this pipe for some time. We will have to take the machine apart to put it right.

admin2018-04-03  29
问题 It seems that oil ______from this pipe for some time. We will 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 本题句意：油似乎已经从这条管道泄漏有一段时间了。我们必须把机器分开修好它。现在完成进行时表示从过去一直延续到现在的动作，而且该动作还有可能延续下去。has been leaking符合题意，故选D。
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