1.Is this Sandy"s ball?
Whose ball is this?
Which ball is Sandy`s?
This is not Sandy"s ball.
2.Isn`t this a book?
This is a book.
3.This is Miss Li"s pen.
This is not Miss Li"s pen.
4.Which dog is yours?
Whose book is that?
Is this you mother?
1.Is this Sandy"s ball?
Whose ball is this?
Which ball is Sandy`s?
This is not Sandy"s ball.
2.Isn`t this a book?
This is a book.
3.This is Miss Li"s pen.
This is not Miss Li"s pen.
4.Which dog is yours?
Whose book is that?
Is this you mother?