单项选择题

America will never again have as a nation the spirit of adventure as it ______ before the West was settled.

A．could
B．did
C．would
D．was
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单项选择题
In this state no office should be for life. If any such should remain, the government should endeavor by degrees to ______ the power.
A．diminish
B．decrease
C．reduce
D．dwindle
单项选择题
He'd better resign from his post, ______
A．wouldn't he
B．shouldn't he
C．couldn't he
D．hadn't he
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