2. 专升本
  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

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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 本题考查时态的用法。句中的时间状语for some time表示动作延续，因此谓语动词leak需要使用完成式；而后面的句子“我们需要把机器拆开修理一下”暗示leak的动作现在仍然在进行。因此，空格处应使用现在完成进行式。
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