单项选择题

Riot police moved through the streets firing into the air to ______ the crowd.

A．broadcast
B．disperse
C．spread
D．diffuse
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单项选择题
Every book should have a(n) ______ which tells us on what page certain information will be found.
A．catalogue
B．reference
C．index
D．roll
单项选择题
The old painting was damaged in the flood and had to be painstakingly ______.
A．recovered
B．restored
C．renewed
D．revived
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