___(having lost/ lost)in the mountains for a week,the 2 students were finally saved .答案选的是LOST,搞不懂为什么如果是HAVING BEEN LOST可以吗？BEING LOST呢？

The key ___,he could not enter the room.A having been lost B had been lost C having lost D losing Getting off the bus,___.A.his purse was lost B.he found his purse lost C.he found his purse los ___(having lost/ lost)in the mountains for a week,the 2 students were finally saved .答案选的是LOST,搞不懂为什么如果是HAVING BEEN LOST可以吗？BEING LOST呢？ Even the best writers sometimes find themselves ___ for words a.lose b.lost c.to lose d.having lost为什么要用lost而不是lose Anna was reading a piece of science fiction,completely ___ to the outside world.选项:a、having been lost b、 to be lost c、losing d、 lost 好迷啊 Even the best writers sometimes find themselves ___ for words.a.lose b.lost c.to lose d.having lost ___ in a book,he didn't even notice a car was coming towards him.A to lose B lost C losing D haviD having lost Los Angeles,loss和lost发音?Los的o在美式音标是发/ Los 关於Los Angeles和Lost美式发音Los的o在美式音标是发/ɔ/还是发/ɑ/?那lost的o呢? ___(having lost/ lost)in the mountains for a week,the 2 students were finally saved答案是lost 说lost 和the 2 students 是被动关系 但是为什么是被动关系不理解 迷路不是自己迷路的吗 难道是被迷路? 非谓语动词 1.___ in thought ,he almost ran into the car in front of him.A.Losting B.Having lost C.Lost D.To lost 为什么不选B?A选项是动名词吧?2.___ his membership card,Tony decided to make a phone call to check whether there was somet Bob flew to Los Angeles to meet his father.改为同义句Bob___ ___ Los Angeles___ ___to meet his father Anna was reading a piece of science fiction,completely ___ to the outside world.Anna was reading a piece of science fiction,completely _D__ to the outside world.A、having been lost B、 to be lost C、losing D、 lost为什么不能选C呢,D和C的 i lost my wallet.what a ___ He said,I lost my pen yesterday.=He said that ___ ___ ___ ___ pen ___ ___ ___. 英语单项（需解释） --------in the mountains for a week ,we finally saved by local policeA ,Having lost B,Losing C ,Being lost D,Having been lost 这这边,having lost the key=lost the key么?句子是这样的：Having lost the key,the boy couldn't enter his house.