Food safety is important. Rules _____ to stop people from food pollution.A．must
题型：不详难度：来源：
Food safety is important. Rules _____ to stop people from food pollution.| A．must make | B．must be made | | C．can make | D．can be made |
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答案
| B |
解析
试题分析：句意：食品安全是重要的。制度必须制定来阻止人们污染食品。前句说道食品安全重要，因此必须制定制度，排除C和D；rules做主语应用被动语态，故选B。 |
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