2. 外语
  3. It seems oil______from this pipe for some time. We’ 11 have to take the machine apart to put it right.

It seems oil______from this pipe for some time. We’ 11 have to take the machine apart to put it right.

admin2012-05-06  22
问题 It seems oil______from this pipe for some time. We’ 11 have to take the machine apart to put it right.
选项 A、had leaked
B、leaked
C、is leaking
D、has been leaking
答案D
解析 现在完成进行时表动作已经持续了一段时间并且还在进行，与for some time相对应。
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C类竞赛（非英语专业本科）

大学生英语竞赛（NECCS）

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