题目内容
Food safety is important. Rules ______ to stop people from food pollution.
| A．must make | B．must be made |
| C．can’t make | D．can’t be made |
B
解析试题分析：句意：食品安全很重要。必须制定措施保护人们远离食品污染。结合语境可知本句主语是动作对象，故用被动语态，含有情态动词的被动结构是情态动词加be 加动词的过去分词，根据句意，选B。
考点：考查被动语态。
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