Food safety is important. Rules to stop people from food pollution.A. must make B. must b

问题补充：

Food safety is important. Rules to stop people from food pollution.

A. must make

B. must be made

C. mustn’t make

D. mustn’t be made

答案：

A. must make

(答案→)B. must be made

C. mustn’t make

D. mustn’t be made

解析：句意：食品安全很重要的。必须制定规则来阻止人们进行食品污染。A. must make必须制定；B. must be made必须被制定；C. mustn’t make禁止制定；D. mustn’t be made禁止被制定。结合句意可知是规则要被制定，用情态动词的肯定被动形式，故选B。

考点: 考查情态动词的用法。