单项选择题

This is what you should bear in mind: Don't ______ a salary increase before you actually get it.

A．hang on
B．draw on
C．wait on
D．count on
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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．artificially
B．automatically
C．manually
D．synthetically
单项选择题
As an actor he could communicate a whole ______ of emotions.
A．frame
B．range
C．number
D．scale
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