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题型：单选题 题类： 难易度：普通
（典中点）人教版（PEP）四年级上册英语 Unit 6 单元重难点提优专训：名词所有格
— I can't see it.
—No, they {#blank#}2{#/blank#} (be) in different {#blank#}3{#/blank#} (class).
— They are {#blank#}2{#/blank#} (Peter).
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