单项选择题

A．orders
B．rituals
C．sectors
D．staples
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单项选择题
After September 11th, 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
It can be inferred from the text that
A．air shipment is indispensable to the industries giants.
B．customers are unwilling to pay for ground delivery.
C．new technologies help cut down on the cost of shipment.
D．the competition among freight shippers is very strong.
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