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题型：单选题 题类：常考题 难易度：普通
仁爱科普版七年级上Unit 1 Making new friends Topic 3 How old are you?专题练习：不定冠词 a；an的用法
—Yes, and he also has eight-year-old daughter.
—I think It's useful film for teenagers to study the world.
Twenty years ago, Tom Brown became
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