The room must have been cleaned by Tom yesterday,________ it?A.mustn't B.hasn't C.didn't D.wasn't选D

——My watch is missing.——You _____it on the desk in your room.A.must forget B.must have forgotten C.must have left D.must leave 为什么选C All other doors were looked,including the door to the reading room where I ___something useful.A.could have found B.could findC.would D.must have found The light is out in her room.she to bed A.must have gone B.had gone C.must be going D.must go答案是选A的,为什么,我不懂.这个是考 have gone to的用法? they must dust the room the young must make room for the old and must ask women to have their seats 证据翻译 I can't find my notebook in the room.I ________in the library last night.A ought to have left; B would have left ; C should have left ; D must have left It's very cold in the room.They ______ off air conditioner.A.should have turnedB.must have turned C.should turnD.must turn答案是B，A错在哪里 The room must have been cleaned by Tom yesterday,________ it?A.mustn't B.hasn't C.didn't D.wasn't选D We must have someone ___ the room.填clean up,为什么不是to clean up The room ___ a stale air.It must have been vacant for a long time. These magazines_____out of the reading-room A.must not take B.must not be taken C.must not take You ____ clean the room now.You ___ do it after supper.A.won't,must. B.don't have to,may. C.needn't,must. D.shouldn't,can为什么选B,其他三个为什么不可以?原因,谢谢! 两个英语问题(请附详细解析_________happened to be no one in the room when the fire broke out.A．It B.This C.There D.That—Oh,the meat has gone bad!—You ________ it in the refrigerator.A.must not have kept B.must have kept C.should have We must keep quiet and walk___out of the room A.We must keep quiet and walk___out of the room A.quiet B.quick C.quietly D.quite Must they dust the room肯定回答 Where are we going to have a meeting?In____A Room 105 B the Room 105 Where are you going to have the meeting? In____?A. 204 Room b.Room 204 C.the room 204 D.the Room 204请解释! The room must have been cleaned yesterday 的反意疑问句The room must have been cleaned yesterday,wasn't it?还是 hasn't it 是不是如果去掉yesterday答案就不同了呢?