单项选择题

With prices ______so much, it is difficult for the school to plan a budget.

A．vibrating
B．swinging
C．fluctuating
D．fluttering
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单项选择题
______their work will give us a much better feel for the wide differences between the two schools of thought.
A．To have reviewed
B．Having reviewed
C．Reviewing
D．Being reviewed
单项选择题
The glass vessels should be handled most carefully since they are______
A．crisp
B．intricate
C．subtle
D．fragile
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