单项选择题

Consumers usually don't know ____________.

A．where to buy cheaper things
B．what materials are needed to improve finished products
C．why they purchase some expensive products
D．the brand names of products they buy regularly

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热门试题

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

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