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题型:单选题 题类:模拟题 难易度:普通
天津市红桥区2019届高三下学期英语第一次模拟考试试卷
—Really? How long _______ there?
Dr Grover Krantz, studied reports of such strange creatures for many years. He {#blank#}1{#/blank#} {#blank#}2{#/blank#} they exist.
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