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题型:单选题 题类:模拟题 难易度:普通
Tom sits {#blank#}1{#/blank#} Mary {#blank#}2{#/blank#} Bill.
The children {#blank#}1{#/blank#} {#blank#}2{#/blank#} {#blank#}3{#/blank#} in Zhangjiakou.
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