单项选择题

The ______ of the flood, which caused thousands of people to lose their houses, was 3 weeks of torrential min.

A．source
B．origin
C．root
D．resource
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单项选择题
Digital recording has made ______ a significantly wider dynamic range, in recorded music.
A．for the possibility
B．the possibility is
C．it is possible
D．possible
单项选择题
They have decided to ______ physical punishment in all local schools.
A．put away
B．break away from
C．do away with
D．pass away
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