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【题目】Food safety is important.Rules________ to protect people from food pollution.

A. must make B. must be made

C. can't D. can't be made

【答案】B

【解析】

句意:食品安全是重要的。必须制定规则来保护人们不受食品污染的危害。must make必须制定;must be made必须被制定,被动语态;can’t不能;can’t be made不能被制定。根据句意可知,主语Rules 和动词make构成被动关系,应用被动语态,此句为情态动词的被动语态,故选B。

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