单项选择题

In London, how does they solve the problem of the traffic congestion

A．They take a completely-free bus service.
B．They experimented a very cheap bus service.
C．Part of the street is for buses only.
D．They closed the streets to cars.

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热门试题

单项选择题

What the writer worries about in a big city is ______.

A．the number of traffic lights
B．the shortage of buses
C．the lack of motorways
D．the traffic congestion

单项选择题

In many cities pedestrians are now much safer because ______.

A．no traffic is allowed on some streets
B．traffic is computer-controlled
C．cars move very slowly
D．only one way streets are open to traffic