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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）小学英语四年级下册module 5 unit 2 They wereyoung.同步测试（一）
—It's {#blank#}1{#/blank#} the box.
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例： (sometimes, on Sundays)
I sometimes play sports on Sundays.
试题篮
(sometimes, on Sundays)