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题型:语法填空(单句) 题类:常考题 难易度:普通
人教版(新课程标准)高中英语必修3 Unit 1同步练习一
Stone is often {#blank#}1{#/blank#} to {#blank#}2{#/blank#}bridges.
—Yes. It is a survival story ________ in space.
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