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题型：单选题 题类：常考题 难易度：普通
外研版（三年级起点）2018-2019学年小学英语四年级上册Module 2 Unit 1 She's reading a book. 同步练习
—What are you doing?
—{#blank#}1{#/blank#}
—They are {#blank#}1{#/blank#}(play) football in the playground.
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