---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
They argued _________ each other ________ the math problem yesterday.
#53087
A
about; with
B
with; to
C
to; at
D
with; about
 I have nothing to do but ________ my daughter in the evening.
#54865
A
to look after
B
looking after
C
look after
D
looked after
My cousin has _______ Project Green Hope since two months ago.
#60521
A
joined
B
taken part in
C
been in the
D
been a member of