单项选择题

The passage is mainly about ______.

A．attempts to find efficient ways of recycling wastes
B．efforts to protect the environment in British cities
C．a good way to locate plants for waste recycling
D．a cheap way to get energy from waste materials

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单项选择题

According to the passage, the first full-scale giant recycling plants will ______.

A．be built in Britain
B．appear in 15 years
C．take us 15 years to build them
D．be found only in some big cities

单项选择题

According to the passage, the reason for big cities to build their own recycling plants is that ______.

A．they can be of great help to the protection of environment
B．it is more expensive to process wastes in a farther dump
C．they can make the wastes into something that is useful
D．they can produce a lot of energy for the local residents