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题型：单选题 题类： 难易度：普通
人教版（PEP）三年级上册（2024）Unit 6 Useful numbers Part B 同步练习
—He the UK.
—No, they {#blank#}2{#/blank#}(are, aren't). They're {#blank#}3{#/blank#}(in, on) the door.
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