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题型：单选题 题类：常考题 难易度：普通
仁爱科普版初中英语2016年九年级上册Unit 1 The Changing World 单元检测题
—_______. He has done well in the exam.
Charlie is {#blank#}1{#/blank#} {#blank#}2{#/blank#} to take the underground alone.
—That sounds fun, but these days I'm too busy{#blank#}1{#/blank#}the singing competition.(填入适当的介词)
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