问题
选择题
Food safety is important. Rules must ________ stop people from food pollution.
A．be made
B．be made to
C．make
D．make to
答案
答案：B
题目分析：句意：食品安全很重要。应该制定相关的法则来组织人们污染食物。Rules和made是被动关系，因此要用被动语态。made是使让动词，变为被动语态时要还原不定式符号to。故选B。