题目信息
Dirt roads may evoke the bucolic simplicity of another century, but financially strained townships point out that dirt roads cost twice as much as maintaining paved roads.
A:dirt roads cost twice as much as maintaining paved roads
B:dirt roads cost twice as much to maintain as paved roads do
C:maintaining dirt roads costs twice as much as paved roads do
D:maintaining dirt roads costs twice as much as it does for paved roads
E:to maintain dirt roads costs twice as much as for paved roads
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正确答案：
B:dirt roads cost twice as much to maintain as paved roads do
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