As everyone knows, rubbish _______ everywhere.
#44969
A
need be thrown
B
mustn’t be thrown
C
can’t throw
D
may throw
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Food safety is important. Rules _____ to stop people from food pollution.
#44569
A
must make
B
must be made
C
mustn’t make
D
mustn’t be made
---How often do I need to feed the birds?---They______ food every day, or they will be hungry.
#44408
A
must give
B
mustn’t give
C
must be given
D
mustn’t be given