单项选择题
Food packages, bottles and tins for drinks can cause ______.
A．air pllution
B．both the litter problem and waste of resources
C．excess consumption
D．unnecessary buying
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单项选择题
In the writer; s view, the more new goods there are, ______.
A．the less pollution we have
B．the harder pollution can be done away with
C．the more pollution there will be
D．the more easily pollution can be controlled
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单项选择题
The main cause of pollution is ______.
A．the production of new industrial goods
B．increased amounts of natural substance
C．our ever-increasing population
D．the release of artificial of natural substances into the environment
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