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
The ball ______ two or three Times before rolling down the slope.
A．swayed
B．hopped
C．darted
D．bounced
单项选择题
According to tile text, Internet banking ______.
A．requires minimal usage fees
B．offers price advantages to users
C．is more efficient than traditional banking
D．is environmentally-conscious
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