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题型：单选题 题类：常考题 难易度：普通
黑龙江省哈尔滨市第六中学2018-2019学年高一上学期英语12月月考试卷
—I went to Ningxia and ________ there for one year, teaching as a volunteer.
They {#blank#}1{#/blank#}his actions {#blank#}2{#/blank#}unnecessary.
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