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高三英语限时完形填空训练（十五）
完形填空(共20小题；每小题1.5分，满分30分)
阅读下面短文，从短文后各题所给的四个选项(A、B、C、D)中，选出可以填入空白处的最佳选项，并在答题卡上将该项涂黑。
The position of children in American family and society is no longer what it used to be. The 36 family in colonial （殖民时期的） North Americn was mainly concerned with survival and 37 that, its own economic prosperity. Thus, children were 38 in terms of their producitivity （生产能力）, and they played the role of producer quite early. 39 they fulfilled this role, their position in the family was one of subordination（附属）。
