单项选择题


A．in which
B．from which
C．of which
D．by which
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单项选择题
In which of the following years did the poor people constitute the largest proportion of the American population
A．1973.
B．1987.
C．1969.
D．1983.
单项选择题
In the eighties, Americans as a whole _________.
A．became richer
B．became poorer
C．lived a poorer life than in the seventies
D．needed more jobs to support their families
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