单项选择题

As used in the text, "hybrid networks" are best related to

A．a new net of ground connections.
B．security scrutiny on packages.
C．a combination of air and ground.
D．mass transport on special vehicles.
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单项选择题
After September 11, long delays of express air shipping often arise because of
A．stricter security regulations enforced.
B．higher payment imposed on customers.
C．stiff competition coming from trucks.
D．failure to cater to customers' needs.
单项选择题
We can learn from the beginning of the text that
A．customers used to attach importance to fancy packaging.
B．there is a radical change in customers' considerations.
C．it is high time that delivery service would better quality.
D．customers now tend to choose speed over cost savings.
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