this is my backpack---------that is my pencil case中应填什么有助于回答者给出准确的答案

This is my backpack.改成复数形式 This is my backpack改为同义句 初一句型转换.This is my cup -this-cup? It is my backpackIt-my backpack It is my backpack _your backpack __ __!Is this__backpack? __,My backpack is here. is this jim's backpack? NO,___backpack is blue 填 Is ____ your backpack No,it isn't .My backpack is big.That one is small.填this还是that It isn't my pencilcase,but this is my backpack是什么意思? This is a backpack.（对.backpack提问） this is my backpack复数,they are my aunts单数,those are my CDs划线提问my CDs. This is my pencil.（改为复数句） It's his backpack.（改为复数句） I t______ this is my sister's backpack.根据句意填入一个恰当的词. this is my backpack---------that is my pencil case中应填什么有助于回答者给出准确的答案 his backpack 改一般疑问句It's his backpack 改一般疑问句His telephone number is 535-2375 改一般疑问句This is my grandmother 改否定句 is this your backpack?翻译成中文 This is his backpack.改成否定句 is this your backpack?翻译成中文 Who backpack is this?改正错句 中文意思：this backpack is his.