this is an eraser in English变特殊疑问句

This is eraser,eraser is inThis is eraser,eraser is in the pencil box.A.a;The B.an;The C.an;An D.the;The(对了,) this is an eraser in English变特殊疑问句 This is an eraser 对an eraser 提问 This is ( )eraser. ( )eraser is in the pencil case . this is an eraser 改复数 this is an eraser 变复数.快 This is an eraser.(改为否定句) This is an eraser.(改为否定句) This is her an eraser.与This is her eraser.This is her an eraser.与This is her eraser.为什么不用“an”? It is an eraser in English. 英语句型转换 （请附加理由,谢谢!）This is an eraser in the box? 对an eraser 提问—— —— in the box? It is an eraser in English?画线部分提问 an eraser画线【 】 【 】 it in English is this your an eraser?是不是对的， Is this your an eraser?哪错了? It is an eraser. It is an eraser? _ has an eraser .This is her eraser .横线上天什么 这句话的翻译 This it is an eraser.这个句子该用在哪,怎么用?为什么不用This ls an eraser.