Whose eraser is this?
This is my eraser. (It's mine.)
Whose pencil is this?
This is my pencil. (It's mine.)
Whose eraser is this?
This is my eraser. (It's mine.)
Whose bag is this?
This is my bag/backpack. (It's mine.)
Whose ruler is this?
This is my ruler. (It's mine.)
Whose book is this?
This is my book. (It's mine.)
Whose ruler is this?
This is my ruler. (It's mine.)
Whose pencil is this?
This is my pencil. (It's mine.)
Whose book is this?
This is my book. (It's mine.)