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单项选择题
A．To save money on equipment.B．To help keep participants from getting lost.C．To instruct newcomers about bicycle maintenance.D．To ensure that everyone knows about the historical sites:
A．To save money on equipment.
B．To help keep participants from getting lost.
C．To instruct newcomers about bicycle maintenance.
D．To ensure that everyone knows about the historical sites:
单项选择题
A．Their competitors have long been advertising on TV.B．TV commercials are less expensive.C．Advertising in newspapers alone is not sufficient.D．TV commercials attract more investments.
A．Their competitors have long been advertising on TV.
B．TV commercials are less expensive.
C．Advertising in newspapers alone is not sufficient.
D．TV commercials attract more investments.
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