it seems oil_____from this pipe for some time ,we'll have to take the machine apart to put it rightA.had leaked B.is leaking C.leaked D.has been leaking我选C错了,请问我错在哪了?
问题描述：
it seems oil_____from this pipe for some time ,we'll have to take the machine apart to put it right
A.had leaked B.is leaking C.leaked D.has been leaking
我选C错了,请问我错在哪了?
答
d
这里强调一段时间内正在发生油从管子里流出来了
答
D
for some time表示动作持续一段时间 用现在完成进行时