问题补充：
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
答案：
A. must make
(答案→)B. must be made
C. can’t make
D. can’t be made
解析：句意:食品安全很重要. 必须制定法律让人们远离食品污染. 结合语境可知下文主语为动作对象,must含义是必须一定,can意思是能,可能. 结合语境可知选B.
