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题型：单选题 题类：常考题 难易度：普通
人教版（PEP）小学英语三年级下册Units 4—6 阶段综合检测题（音频暂未更新）
—It's on the desk.
—They are black.
—It's on the table.
—_______ boy?
—It's 3,000 kilometres long.
—_________ bike.
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