单项选择题

The writer believed he had passed the exam ______.

A．as the result of his hard work
B．as the result of his professor's showing mercy to him
C．mainly due to his tireless revision in the night before the exam
D．out of his expectation
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单项选择题
The sentence ... AMR, Corp's American Airlines, the world's biggest carder, could follow later this year ( Paragraph 7) can best be restated as ______.
A．it would also seek bankruptcy protection
B．it would have to spur its passengers' demand for tickets
C．it would have to take aggressive steps to avoid bankruptcy
D．it would call for more financial subsidy from the government for its survival
单项选择题
U.S. airlines would have to suffer the following losses if there were war with Iraq except that ______.
A．the industry would have to lose $180 million revenue each year with one gallon of jet fuel increasing one penny on sale
B．the overall traffic volume is expected to drop at least over eight percent, which took place during the first gulf war
C．the U. S. government refuses to give the main airline companies any essential financial sup- port once the war broke out
D．it would take a few years to get the prewar ticket prices resumed and then to spur the passengers' riving demand
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