---Look! That’s Amy.   ---It _______ be her. She’s gone to Xi’an.
#74867
A
must
B
can
C
may
D
can’t
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My sister met him in the hospital yesterday afternoon, so he _________ your lecture.
#62533
A
couldn’t have attended
B
needn’t have attended
C
mustn’t have attended
D
shouldn’t have attended
— Must they clean and tidy the classroom now? — No, they      . It       after school in the afternoon.
#78237
A
mustn’t; must clean
B
needn’t; must clean
C
mustn’t; need be cleaned
D
don’t have to; can be cleaned
She _________play a joke on him in case he becomes angry 
#63247
A
dares not
B
dares not to
C
dare not
D
not dare