单项选择题

Without the help of the government few people along the river would______ the recent flood.

A．survive
B．retain
C．maintain
D．sustain
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单项选择题
This washing machine is______ to the other washing machines on the market.
A．super
B．advantageous
C．superior
D．beneficial
单项选择题
It can be predicted that educational TV programs will cover a wider______ of subjects in the few years to come.
A．range
B．series
C．extent
D．variety
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