this is a pencil-box这个句子有什么错

This is a pencil box.对a pencil box 提问 This is a pencil box.(对” a pencil box”提问 ) This is a pencil box 改为一般疑问句 this is a pencil-box这个句子有什么错 Is this pencil box?(改为陈述句) 改为复句this is my pencil box is this her pencil box?改为陈述句 （ ）pencil-box is this?填什么 is this your pencil-box?的答语 This pencil box is orange.改同义句This is ----- ----- pencil box.下面两个回答不对， That is a red pencil box.()That is a red pencil box.(改为否定句)____________________________.Is this your baseball?(作否定回答)___________________________. Is 【this】 your pencil-box.问为什么用this. whose pencil-box is this回答 a,my b,mine c,me d,l This isn't my pencil box.-----is red.A.My B.Mine C.Her D.his This is his pencil-box.改为复数句子怎么改? This is my pencil-box 改为同义句 This pencil box is _____ (nice) than that one. this is my pencil box.改为否定句