单项选择题

How to determine the ______ of the hill with the aid of a barometer (气压计)

A．altitude
B．attitude
C．gratitude
D．attribute
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单项选择题
The used old small typewriter is really ______.
A．a piece of cake
B．a piece of work
C．a piece of junk
D．a valuable machine
单项选择题
The ______ decision to pay the ransom (赎金) saved the passengers' lives.
A．quick
B．haste
C．sudden
D．hurried
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