单项选择题

The U.S was in 1850 a (divided) nation half slave and half free.

A．allied
B．combined
C．united
D．separate
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单项选择题
It is (great) decision for the young boy to have to make.
A．weighty
B．chief
C．prominent
D．remarkable
单项选择题
He could never be (content) until he could afford to buy that beautiful car.
A．full
B．rich
C．wise
D．happy
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