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题型：单选题 题类：常考题 难易度：普通
山东省菏泽市开发区2020-2021学年五年级下学期英语6月月考试题
—_________ bike.
—No, they {#blank#}2{#/blank#}(are, aren't). They're {#blank#}3{#/blank#}(in, on) the door.
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