May we leave the classroom now? No, you _____. You_____ to leave until the bell rings.
#44732
A
mustn’t, are allowed
B
don’t have to , are supposed
C
needn’t , aren’t allowed
D
can’t , aren’t supposed
推荐题目
 The girl was often heard ______ happily in her room.
#44796
A
sing
B
to sing
C
singing
D
sings
It is true that knowledge_____ rather than being taught. 
#44980
A
learns
B
learned
C
is learned
D
was learned
--- Can you tell me whom the play ______ in the 1990s?--- Sorry, I don’t know.
#44626
A
was written by
B
was written
C
is written
D
1s written by
—Hey, Jack. Waste paper ________ here.—Sorry, I won’t do that again.    
#44557
A
cannot throw
B
cannot be thrown
C
will not throw
D
will not be thrown