单项选择题

I ______ along the Great Wall for hours when I saw her.

A．traveled
B．was traveling
C．travel
D．might travel
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单项选择题
I rushed to the meeting without breakfast. Only _____ that it had been postponed.
A．to tell
B．to be told
C．telling
D．told
单项选择题
My university lies in the north of the city. around ______ high mountains.
A．which is
B．it is
C．which are
D．them are
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