Food safety is important. Rulesto stop people from food pollution.A must make B must be ma

问题补充：

Food safety is important. Rulesto stop people from food pollution.

A、must make B、must be made C、can’t be made

答案：

解析：考查被动语态。句意为：食品安全很重要。必须制定制度来阻止食品污染。因为rule（制度、条例）是动词make（制定）动作的承受者，所以必须用被动语态（be+动词过去分词）。故选B