单项选择题

______ in the United States, St. Louis has now become the 24th largest city.

A．Being the fourth biggest city
B．It was once the fourth biggest city
C．Once the fourth biggest city
D．The fourth biggest city it was
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单项选择题
A．ButB．ThereforeC．AfterwardsD．Furthermore
A．But
B．Therefore
C．Afterwards
D．Furthermore
单项选择题
They are trying to ______ the forest to its original pristine condition.
A．revive
B．restore
C．renew
D．refresh
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