It seems oil leaves from this pipe for some time. We’ll have to take the machine

游客2023-12-25 57

问题 It seems oil leaves 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

解析看样子油从这个管道渗漏出来已经有一会了，我们得把机器拆开来修好它。本题考查时态的用法。leak为表语从句的谓语动词，由时间状语for some time可知动作已经持续了一段时间。且还在继续，因此要用现在完成进行时，故选D项。

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