单项选择题

According to the passage, new technologies are likely to influence _____.

A．the extent of competition
B．people's spending power
C．attitudes to advertising
D．the way people shop
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单项选择题
According to the passage, the age range of some businesses' customers may be limited because of _____.
A．social/cultural factors
B．economic factors
C．legal/political factors
D．factors of state
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