单项选择题

So many directors ______, the board meeting had to be put off.

A．were absent
B．being absent
C．been absent
D．had been absent
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单项选择题
All the people in the stadium cheered up when they saw hundreds of colorful balloons ______ slowly in to the sky.
A．ascending
B．elevating
C．escalating
D．lingering
单项选择题
A．boundlessB．changeableC．limitlessD．ceaseless
A．boundless
B．changeable
C．limitless
D．ceaseless
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