单项选择题

According to the author, in the nineteenth century people gradually ______.

A．emigrated to other countries
B．often settled in the West
C．tended to change the place in which they lived
D．had a higher rate of birth than ever before'

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单项选择题

The word rent ( Line 9, Para. 3 ) is closest in meaning to ______.

A．returned
B．paid
C．broken
D．leased

单项选择题

It can be inferred from the passage that in the nineteenth century ______.

A．Americans were confident that the economic growth would bring a better society
B．many values of social order were strengthened
C．the social roles of men and women became more flexible as the society developed so rapidly
D．the great number of immigrants helped to increase the population