单项选择题

One disadvantage of alliances foreseen by the critics is that air travel may be more
expensive as a result of

A．less convenience.
B．higher operation costs.
C．less competition.
D．more joint marketing.
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单项选择题
Which is the best word to describe air travellers' reaction to airline alliances
A．Delight.
B．Indifference.
C．Objection.
D．Puzzlement.
单项选择题
According to the passage, setting up airline alliances will chiefly benefit
A．North American airlines and their domestic travellers.
B．North American airlines and their foreign counterparts.
C．Asian airlines and their foreign travellers.
D．Asian airlines and their domestic travellers.
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