－ Whose is this blue bike?
－It ________ be Mary’s. Her bike is black and white.

That man ________ be Mary’s father, as he is much taller.

1. A.
   can
2. B.
   must
3. C.
   can’t
4. D.
   mustn’t

 "The volleyball must belong to Mary" means_________

A．The volleyball must be Mary           B．Mary has a volleyball

C．The volleyball must be Mary's           D．That can't be Mary's volleyball

－ Whose is this blue bike?

－It ________ be Mary’s. Her bike is black and white.

A．must             B．can’t            C．can              D．mustn’t