单项选择题

The shipping authorities followed the ________of the unidentified submarine on their radar screens.

A．channel
B．way
C．course
D．direction
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单项选择题
Oil sales volume in local urban and rural areas rose by 24% and 50% ________, over July 2006.
A．separately
B．individually
C．independently
D．respectively
单项选择题
We'll never get to the station on time we run as fast as we can.
A．in case
B．even if
C．provided that
D．if only
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