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Food safety is important. Rules        to stop people from food pollution.
A.must makeB.must be madeC.can’t makeD.can’t be made
B
考查含有情态动词的被动语态的基本构成,情态动词+be+过去分词,句意:食品安全是重要的,必须制定规则使人们远离食品污染。Rule和make是被动关系,用must be made,选B。
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