单项选择题

The person who does not pay for a public good______.

A．keeps himself from using its benefit
B．cannot enjoy its benefit at any time
C．fails to keep its benefit from being used
D．enjoys its benefit all the same

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热门试题

单项选择题

According to the passage, public goods are______.

A．services enjoyed by all people
B．what we can buy and sell in public
C．products that we make for national defense
D．taxes paid by the people involved

单项选择题

In the third paragraph the author explains______.

A．what role the market system plays in producing public goods
B．how weak the market system is in producing public goods
C．why some people refuse to pay for public goods
D．what we can do to make use of the market system