Food safety is important. Rules _____ to stop people from food pollution.
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A
must make
B
must be made
C
mustn’t make
D
mustn’t be made
推荐题目
It is true that knowledge_____ rather than being taught.
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A
learns
B
learned
C
is learned
D
was learned
Many accidents ______ by careless drivers last year.
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A
are caused
B
were caused
C
have caused
D
will cause
Mr. Smith, together with his sons, _____ supper at 7 o’clock yesterday evening．
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A
was eating
B
were eating
C
was eat
D
were eat