is not your eraser that 连词成句

is that not your eraser?这句话对吗?That isn't your eraser.变一般疑问句is that not your eraser? is not your eraser that 连词成句 Is this your eraser?NO,it is not.Ithink{ }1;it his eraser 2;its his eraser 3;it is his eraser改选哪一个 Is this your eraser?---No,it isn't.I think ___.A.it her eraser B.its her eraser C.it's her eraser is this your eraser?no,it is not,it is（ ）,填空,me,my,her,hers, Is that your eraser?(改为同义句）Is----------eraser-----------? is,not,your eraser,that 怎样连词成句变为一般疑问句 连接成句is,not,your,eraser,that（?）are,brothers,my,these（?） It is ( )ruler.It is not( )eraser. is this your eraser? ( ).it's my sharpenis this your eraser? ( ).it's my sharpener.a.no,it isn't.b.yes,it is. Is this your eraser怎么回答 is this your eraser的同义句 前面是Is this your eraser is this your eraser?【同义句】 what c( )is your eraser 填空 (yes,it is)(ls it an eraser)(no,it isn't)(ls it your pencil box,too? (yes,it is.)(ls it an eraser)(no,it isn't.)(ls ie your pencil box,too)这些分别是什么意思? Is this your eraser?No,it isn't.I think ( ) 这个该怎么填?失物招领箱里有一串钥匙