—To make our city more beautiful, rubbish         into the river. —I agree.
#78182
A
needn’t be thrown
B
mustn’t be thrown
C
can’t throw
D
may not throw
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 — Can we leave the classroom now?— No, you ______. You ______ to leave until the bell rings.
#74363
A
mustn’t, are allowed
B
don’t have to, are allowed
C
needn’t, aren’t allowed
D
can’t, aren’t allowed
He has      for three or four days. 
#78091
A
got a headache
B
fallen ill
C
caught a cold
D
had a cough
–Must I finish my homework tonight?-No, you______.
#75994
A
Can’t
B
Mustn’t
C
needn’t
D
may not