--- Can you hear a girl ______ in the room?--- Yes. let’s go to see her. 
#76958
A
sing
B
to sing
C
singing
D
to singing
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----May we leave the classroom now?----No, you         . You           to leave until the bell rings.
#75525
A
mustn’t; are allowed
B
can’t; aren’t allowed
C
don’t have to; are allowed
D
needn’t; aren’t allowed