I left a backpack on the train to beijing the other day否定句疑问句和肯定回答否定回答

I left a backpack on the train to beijing the other day否定句疑问句和肯定回答否定回答 Where is your backpack.---Oh,I it on my desk.A.left B.forgot C.leave D.forget 用there be 句型改写I have two pens and a backpack on the desk. 把下面的句子用there be句型改写,I have two pens and a backpack on the desk. The girl ____her backpack at school this morning.A.remember B.forgot C.leaves D.left the key __ on the table when i leave A.was left B.will be left C.is left D.has been left The key （ ）on the table when i leave.A:was left B:is left C:will be left D:has been left The key ___ on the table when I leave.A.was left B.will be left C.is left D.has been left Father ____ for London on business upon my arrival,so I did not see him.A has left B left C was leC was left D have left The moment I got home,I found I _________ my jacket on the playground.A.had left B.left C.have left D.was leaving I want to buy a backpack.(改为否定句) I can't live out of a backpack.求翻译 I found a of keys in the backpack —I bet someone stole my backpack.—Well,you________ have kept an eye on it A.may B.can C.would D.should 望马上解答.A:Mum,()ismy() .B:Your backpack?Is ()under the chair?A:No,it isn't.B:Is it on the sofa?A:Yes,it is.How ()()notebooks?B:Are ()in your backpack?A:No,they aren't.B:Yes.I remember.Ther are ()the ().A:On the table?On,yes,they're here.()you I am on your left,leaning your left shoulder just go along this street and turn_________.the hotel is_________.A.left;left B.left;on the left C.on the left;left D.left;to the left can you help （he）with the backpack they left shanghai on march first and get to xian on the这个句子有什么语法错误吗?