中文谷—Foodsafetyisveryimportant.—Sosomerules
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问题详情：
—Food safety is very important.
—So some rules ________ to stop people from polluting food.
A．must make B．must be made
C．must made D．be made
【回答】
B
知识点：动词语态
题型：选择题
标签：
Sosomerules
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