单项选择题

We have been told that under no circumstances ______ the telephone in the office for personal affairs.

A．may we use
B．we may use
C．we could use
D．did we use
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单项选择题
Astronomers at the University of California discovered one of the most distant ______
A．paradoxes
B．paradises
C．galaxies
D．shuttles
单项选择题
A characteristic of the information age is that __________
A．the service industry is relying more and more on the female work force
B．manufacturing industries are steadily increasing
C．people find it harder and harder to earn a living by working in factories
D．most of the job opportunities can now be found in the service industry
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