A:When leaving,B:When one is leaving,C:Leaving,D:When one ha

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A:When leaving,B:When one is leaving,C:Leaving,D:When one had left
()a car in this car park,the brakes must be left out

C.
A C 的逻辑主语不对,D时态不对
再问：答案是B，我一直想不通啊
再答：答案确实是B, 我打错了，AC是一样的。本题的句子的主语是 the brakes, 谓语是must be left out. 动词的ing形式作状语时，它的动词和主语是主动关系。也就是说：AC中的状语相当于when the brakes leave, 这显然是不对的。B中的one指的是人，所以是对的。意思是：将车放在停车场时，一定不要刹车(估计指的是拉手刹）

A:When leaving,B:When one is leaving,C:Leaving,D:When one ha When you for beijing?A do leave B are leaving C did leave D When is your brother leaving home? 为什么是leaving? The door bell ＿＿when I was leaving.A.rang B.ringing C.rings The door bell _____ when I was leaving.A rang B ringing C ri 一道英语专四选择题—— is his own decision.A when leaving B when does h -when are you leaving?-I'm leaving（）next weekend one afternoon,he was leaving school when it began to rain.中, Yesterday I was leaving school when one of my old friends___ when they're leaving there的意思 when are you leaving?怎么完整回答 When are you leaving _____ Beijing