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 president of the country ______ him to be the Secretary of State.
A．elected
B．nominated
C．voted
D．notified
单项选择题
She gave ______ directions about the way the rug should be cleaned.
A．acute
B．brisk
C．explicit
D．energetic
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