问题
My parents _______ have arrived at suppertime but their flight was held up due to the heavy fog.
A:will
B:can
C:must
D:should;
B:can
C:must
D:should;
正确答案是：
同类题型
My mother has a backache in hospital —_________________.
Mr. Smith, _______ of the ______ speech, started toread a novel.
In such a fierce competition, a person has to make every effort if he________. [ ]
They often chatted about the hard times______they spent together in the old days
The police (family, team)_______ out in search of the missing boy.[ ]