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题型：单选题 题类：模拟题 难易度：普通
外研版（三起点）小学英语四年级上册期末模拟测试（二）（音频暂未更新）
They {#blank#}1{#/blank#} （were/weren't）dirty then.
They {#blank#}2{#/blank#} （are/aren't）clean now.
—Yes, they are.
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