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题型:单选题 题类:常考题 难易度:普通
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组卷次数:5次 +选题
-It needs __________ so that it can be reused.
They {#blank#}1{#/blank#} {#blank#}2{#/blank#} {#blank#}3{#/blank#} the way {#blank#}4{#/blank#}.
I want {#blank#}1{#/blank#} Egypt {#blank#}2{#/blank#}.
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