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
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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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We had thought that he was a respectable sponsor, but it _________emerged that he was an criminal.
A．subsequently
B．successively
C．consequently
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