单项选择题

I must have waited for ten minutes before the telephone operator put me through.()

A. hung up
B. hung on
C. hung over
D. hung round

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All of the tenants in the building complained about the lack of hot water.
A．old people

B．landlords
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He was elevated to the post of prime minister.()

A. pulled
B. promoted
C. lifted
D. treated
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