单项选择题

Follow your doctor's advice, ______ your cough will get worse.

A．or
B．and
C．then
D．so
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单项选择题
An Olympic Marathon is 26 miles and 385 yards, approximately ______ from Marathon to Athens.
A．distance
B．is the distance
C．the distance
D．the distance is
单项选择题
He ______ me if I felt like swimming in winter.
A．asks
B．tells
C．asked
D．told
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