单项选择题

A．A new fuel for buses.
B．The causes of air pollution.
C．Careers in environmental engineering.
D．A way to improve fuel efficiency in buses.
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单项选择题
The promoted Japanese manager asked for a transfer because ______.
A．he was not competent, for the higher position
B．he was not accustomed to working by himself
C．he could not make the adjustment to his new job
D．he lacked adequate communication with his superiors
单项选择题
The Japanese staff complained to the American manager because ______.
A．the American manager had lied to them
B．the salary increases were insufficient
C．most staff had not received salary increases
D．there was a misunderstanding of the word "fair"
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