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2016英语四级篇章词汇阅读篇NO.10免费下载，
ndents as well---grandparents, uncles, aunts and cousions. Such "extended" families were suited for survival in slow paced __1__ societies. But such families are hard to __2__. They are immobile.
Industrialism demanded masses of workers ready and able to move off the land in p
2016英语四级篇章词汇阅读篇NO.10
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