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英语六级模拟试卷(01)－－阅读2免费下载，
in colonial North America was primarily concerned with sheer physical survival and beyond that, is own economic prosperity. Thus, children were valued in terms of their productivity, and they assumed the role of producer quite early. Until they fulfilled this role, their position in the structure
英语六级模拟试卷(01)－－阅读2
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