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．was
C．would
D．did
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单项选择题
Although Anne is happy with her success she wonders ______ will happen to her private life.
A．that
B．what
C．it
D．this
单项选择题
Not until the game had begun ______ at the sports ground.
A．had he angled
B．would he have arrived
C．did he arrive
D．should he have arrived
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