问题

Who______ it be that is knocking at the door? —It ______ be Father, but I’m not sure.
A:can; must
B:can; may
C:must; can
D:may; must
B:can; may
C:must; can
D:may; must
正确答案是:
同类题型
Miss Read is good ______ music. She is good ______ children in the Music Club.
.Thetwo brothers look so much ___ that we can’t___ one from the other.
canI get the book if I order it today— In a week.
We went right round to the west coast by__________ sea instead of driving across _________ continent