This is a pen and that’s an eraser.可不可以写成This is a pen and t

This is a pen and that’s an eraser.可不可以写成This is a pen and t This is Peter's pen and that is ( )pencil,( )a red pencil.(h this is a red pen.and that is a green pen.（改为同义句） this is a This is a pencil and a pen还是This are a pencil and a pen, Look,this is a pen.lt's black.This is a pencil.lt's red .And This's a pen and that's a ruler. What's this?——___.(①It's a pen.②This is pen.③This is an pen. This is a pen and ____ is a pencil. There is a pen and an eraser in the box否定句和一般疑问句和a pen and a This is an eraser That is a this is an english book （）that is a pen 填空,有选择,and,too,but,o This is a pencil and a pen还是These are a pencil and a pen