---Listen, Mum. I heard the footsteps. Is it Dad? ---It ___ be him. He’s gone to Beijing on business this morning.
#53951
A
can’t
B
mustn’t
C
needn’t
D
shouldn’t
推荐题目
Granny is sleeping. You’d better __________.
#61633
A
not wake up her
B
not to wake up her
C
not wake her up
D
not to wake her up
--- You were out when I went to visit you yesterday.---Oh, I________ for a friend from England at the airport.
#52691
A
was waiting
B
had waited
C
am waiting
D
have waited