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.
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单项选择题
A．Go through a health check.B．Take little luggage with them.C．Arrive early for boarding.D．Undergo security cheeks.
A．Go through a health check.
B．Take little luggage with them.
C．Arrive early for boarding.
D．Undergo security cheeks.
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