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题型：单选题 题类：常考题 难易度：普通
北师大版（一起点）小学英语一年级上册Unit 3同步练习（3）
— It's a cat.
—________.
—She is reading a book.
空气 (汉译英) {#blank#}2{#/blank#}.
what's (完全形式) {#blank#}3{#/blank#}.
has (原形) {#blank#}4{#/blank#}.
— It's in front of the science museum.
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