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题型：单选题 题类：常考题 难易度：普通
牛津上海（试用本）2018-2019学年小学英语四年级下册期中测试B卷
— Sorry. I don't know.
—No, they {#blank#}2{#/blank#} (be) in different {#blank#}3{#/blank#} (class).
—No. We've already finished it.
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