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The typical pre-industrial family not only had a good many children, but numerous other dependents as well---grandparents, uncles, aunts and cousins. 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 pursuit of jobs, and to move again whenever necessary. Thus the extended family __3__ shed its excess weight and the so-called "nuclear" family emerged---a stripped-down, portable family unit __4__ only of parents and a small set of children. This new style family, far more __5__ than the traditional extended family, became the standard model in all the industrial counties. Super-industrialism, however, the next stage of Eco-technological development, __6__ even higher mobility. Thus we may expect many among the people of the future to carry the streamlining process, a step further by remaining children, cutting the family down to its more __7__ components, a man and a woman. Two people, perhaps with matched careers, will prove more efficient at navigating through education and social status, through job changes and geographic relocations, than the ordinarily child-cluttered family.A __8__ may be the postponement of children, rather than childlessness. Men and women today are often torn in __9__ between a commitment to career and a commitment to children. In the future, many __10__ will sidestep this problem by deferring the entire task of raising children until after retirement
.A)transplant
B)solution
C)gradually
D)transport
E)elemental
F)conflict
G)continually
H)mobile
I)couples
J)agricultural
K )including
L)compromise
M)requires
N)primary
O)consisting
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