John is honest boy and good at making airplane model.
—Whose guitar is this?—It________Alice.She plays the guitar.
—Who’s the man over there?Is he our English teacher?—No,he________be our English teacher.He________be our Chinese teacher because our Chinese teacher is much taller than our English teacher.
“________bookcase is this?”“It must be________.”
The nice hair band must belong to Jane,because she is the only girl here.
The nice T-shirt must be________,because they both like wearing T-shirts.