“Not having returned home yet, _________”, his father said to the police.
#63543
A
his mother got worried
B
his mother must be worried
C
I think he is missing
D
he must have got into some trouble.
推荐题目
— Must I finish my homework now, Mum? —No, you _____. You can do it tomorrow.
#74665
A
mustn’t
B
needn’t
C
can’t
D
shouldn’t
I am fond of my sister but she has one serious shortcoming. She _________ be really stubborn.
#63474
A
can
B
may
C
must
D
shall
My sister met him at the street yesterday afternoon, so he __________ your lecture.
#63077
A
shouldn’t have attended
B
couldn’t have attended
C
mustn’t have attended
D
needn’t have attended
Without gravity, we _____ walk on the ground as freely as we do now.
#63085
A
couldn’t
B
mustn’t
C
shan’t
D
needn’t