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题型：单选题 题类：常考题 难易度：普通
2016年新目标英语中考知能综合检测二十一：九年级 Units 13-15
— At the end of the year 2006. They _______ for nearly ten years.
Water{#blank#}1{#/blank#} {#blank#}2{#/blank#}about 70 per cent of the human body.
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