单项选择题

There was a big hole in the road which ______ the traffic.

A．set back
B．stood back
C．held up
D．kept down
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单项选择题
The World Trade Center, the top ______ was 410 meters high, .was the tallest building in the world.
A．which
B．of which
C．of whose
D．that
单项选择题
Another big issue ______ the new republic is the problem of the education of its citizens.
A．confining
B．confirming
C．conforming
D．confronting
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