试题 试卷
题型：单选题 题类：常考题 难易度：普通
安徽省合肥市阳光中学2020届九年级上学期英语12月月考试卷（含完整音频）
—So some rules _______ keep people from polluting food.
——Yes. You are so kind.
—I think a bridge over the river.
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