单项选择题

Many people think that the standards of public ______ have declined.

A．morality
B．rightness
C．awareness
D．mentality
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单项选择题
The ship's generator broke down, and the pumps had to be operated ______ instead of mechanically.
A．manually
B．artificially
C．automatically
D．synthetically
单项选择题
The explorer lost his way so he climbed to the top of the hill to ______ himself.
A．spot
B．locate
C．place
D．situate
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