---- Someone is knocking at the door.
---- It ______ be Tom. He is still in the school.
A.can’t | B.mustn’t |
C.could not | D.might; not |
---- Someone is knocking at the door.
---- It ______ be Tom. He is still in the school.
A.can’t | B.mustn’t |
C.could not | D.might; not |