单项选择题

The readers were warned to be cautious when buying items ____________.

A．on credit
B．at a discount
C．on promotion
D．advertised in television
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单项选择题
The passage is mainly concerned with ____________.
A．various ways to protect their rights
B．the free enterprise system in America
C．creative techniques in marketing
D．the advances of advertising techniques
单项选择题
What may probably cause the Watergate Scandal
A．The presidential campaign in 1972.
B．American involvement in Indochina.
C．The signing of the treaty to limit strategic nuclear weapons.
D．The entry into the offices of the Democratic National Committee by force.
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