Question

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

Answer 1

B

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。