单项选择题

With prices ______ so much, it is impossible for the company manager to stick to the original budget.

A．waving
B．swinging
C．fluctuating
D．vibrating
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单项选择题
The ______ friend was exposed in the end to be a hidden rival who had been plotting against the company's marketing in Hong Kong.
A．professed
B．announced
C．exclaimed
D．declared
单项选择题
When solid changes to liquid, it ______ heat from all substances near it and this reduces the temperature surrounding it.
A．takes in
B．takes on
C．takes off
D．takes down
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