单项选择题

How would fresh water be supplied to the city

A．By treating sea water.
B．By getting it from the surrounding islands.
C．By building a small lake of fresh water inside the city.
D．By transporting it from the mainlan

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热门试题

单项选择题

The purpose of the writer is ______.

A．to suggest how a new type of harbour could be built at sea
B．to give an account of a new-type city
C．to draw people's attention to the problem of air pollution
D．to introduce a new way of constructing harbour-cities