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题型:单选题 题类:常考题 难易度:普通
天津市河东区人教精通版(三年级起点)五年级下学期英语期末考试(含完整音频)
B: ______________ is playing the violin.
—No. It's book.
—No, it {#blank#}1{#/blank#} (isn't/is).
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