单项选择题

America will never again have as a nation the spirit of adventure as it ______ before the West was set tied,

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
______ for a long time, the fields are all dried up.
A．There has been no rain
B．Having no rain
C．There having been no rain
D．There being no rain
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