单项选择题

The children cheered up when they saw hundreds of colorful balloons ______ slowly into the sky.

A．floating
B．raising
C．heaving
D．ascending
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单项选择题
The new law will only have a ______ effect on the lives of most people.
A．nominal
B．marginal
C．skeptical
D．medieval
单项选择题
You can not expect people to work hard unless you give them some kind of ______.
A．motive
B．incentive
C．fascination
D．temptation
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