That is ( ) eraser.
That is ( ) eraser.
That is my eraser.
That eraser over there is my eraser
--is that( )eraser?--yes,it,s( )eraser.
That is not his eraser
that is my red eraser
This is an eraser That is a
That is her eraser改为否定句
that is my eraser 改为复数句
That is his eraser改为一般疑问句
That is her eraser.改为一般疑问句
Is that her eraser?作肯定回答