Question

【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

Answer 1

【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。