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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
被动语态的用法。 本句句意:食品安全很重要,必须制定制度来阻止人们遭受食品污染;根据句意应该含情态动词must的被动语态,即must be done。
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