单项选择题

There would be no air pollution to this city because ______.

A．there was a special plant to treat the polluted air
B．the city was away from the mainland
C．people in the city did not burn oil or coal
D．vehicles there were powered by electricity

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热门试题

单项选择题

What was suggested about the construction of a new city at sea

A．The city was to be designed together with a harbour.
B．The walls around the city would be made of steel and glass.
C．The buildings of the city would rest on a floating island.
D．The people would live in flats made of coloured glass.

单项选择题

The suggestion made by the committee is to solve the problem that ______.

A．there is not enough space for building cities on land
B．land transportation has become increasingly difficult
C．there are too many people on land
D．present cities are heavily polluted by cars and other vehicles