单项选择题

The advantage of overhead bridges is ______.

A．they don't hold up traffic and they are safer
B．they are higher
C．they are more convenient to use
D．people can see traffic better
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单项选择题
People are encouraged to use overhead bridges ______.
A．to prevent accidents and loss of life
B．because they could see moving cars slowly
C．in order to save, money for the government
D．in order that traffic may fl6w smoothly
单项选择题
What do old people think of crossing the overhead bridges
A．They like the idea of building the overhead bridges.
B．They have no difficulty using the overhead bridges.
C．They think the overhead bridges are too expensive to build.
D．They find overhead bridges somewhat inconvenient to use.
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