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.

admin2016-02-04  49
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 此题测试的是时态。现在完成进行时是指动作到目前为止，并且还将延续下去的状况，如本句。首先，句中有时间状语for some time，这是典型的完成时态标志，据此排除B和C。A项是过去完成时，表示到过去某一时刻已发生的情况，而句子说的是现在的情况，所以A也是错的。句意为：油好像从这个管子里漏出一段时间了，我们得把机器拆开再把管子装好。
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