单项选择题

The ship's generator broke down, and the pumps had to be operated ______ instead of mechanically.

A．automatically
B．artificially
C．superficially
D．manually
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______ you are proven innocent, you can shake off all the shadows cast on you.
A．While
B．Even though
C．Now that
D．For
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I'm very glad to know that my boss has generously agreed to ______ my debt in return for certain services.
A．take away
B．cat out
C．write off
D．clear up
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