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
As a result of his pioneering work in the late 1930's, Earl Hines has been called the father of modern jazz piano.
A．professional
B．artistic
C．excellent
D．original
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