31.He has lost key to the locker () some important papers are kept.a.in which b.under whichc.inside选什么,怎么分析的?

he lost his key t----- the door. the key,___ he lost ,has been found He can't find his key.He ---------- them.A.must lost B.must have been lost C.must have lost 31.He has lost key to the locker () some important papers are kept.a.in which b.under whichc.inside选什么,怎么分析的? Tom can't get into the room because he __(lost)the key to the door. He lost the key ____ the door He can't open the door because he ______ his key just now.横线上是填has lost 还是lost?这道题目的答案在参考书上是lost.我思忖着,just now表示刚刚的意思,所以用过去时.但是just now 还是有一个意思是“现在 He has lost the key to the drawer ____ the papers are kept.A.whereB.in which选哪个?为什么? What has happened?What has happened?---I have lost my key and can't open the door.为什么不能用What happened?---I lost my key and i can't open the door.两者的区别是什么? _____,the boy couldn't enter his house.A.Since the key has lostB.The key been lostC.Lost the keyD.Having lost the key答案应该选B?为什么不能选ACD?请说明理由,谢谢~ the key to my door___.i have looked for it every where,but i still__itA is missing ;can't find B has lost ; don't findC has lost ; haven't foundD has been gone ; haven't found为什么选A What-------? I --------my key and can't open the door.A.happened;lostB.has happened;lostC.happens;have lostD.has happened;have lost选哪个?为什么? 16. He has lost the key to the drawer _____ the papers are kept. A. where B. on which C. under which D. which 十万火急的英语问题：he has lost the key to the drawer ()the papers are kept并翻译句子为什么括号中要填IN WHICH ,而不WHERE? He has lost the key to the box_____the money is kept.A.where B.which C.on which D.on that He has lost the key to the drawer ( ) the papers are kept.A.where B.in which C.under which D.which He must have lost the key the day before yesterday,_____?A.must he B.hasn't he C.needn't he D.didn't he答案应该选D,为什么不选B?请说明原因, 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.