单项选择题

In times of severe _________companies are often forced to make massive job cuts in order to survive.

A．retreat
B．restriction
C．recession
D．competition
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单项选择题
She packed her bags, then called the airport and made a(n)_________on the last flight out of Los Angeles.
A．conservation
B．reservation
C．preservation
D．observation
单项选择题
Our ability to _________from this high-tech communications equipment is greatly enhanced by foreign language skills.
A．assist
B．benefit
C．acquire
D．reward
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