单项选择题

When this story begins, the writer ______ .

A．was working for a man called Rogers
B．was on his way to work in the morning
C．was going back to work after lunch
D．had finished work and was going home

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单项选择题

The word it in paragraph 3 refers to ______ .

A．a product or service
B．competition
C．revenue
D．oligopoly

单项选择题

Which of the following would be the best title for the passage

A．Monopolies
B．The Commodity Market
C．The Competition Continuum
D．The Best Type of Competition