单项选择题

To my great relief, the manager promised to have my complaint______ .

A．looked through
B．looked over
C．looked into
D．looked after
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单项选择题
The children cheered up when they saw hundreds of colorful balloons______ slowly into the sky.
A．floating
B．hoisting
C．heaving
D．ascending
单项选择题
In this factory the machines .are not regulated______ but are jointly controlled by a central computer system.
A．independently
B．individually
C．irrespectively
D．irregularly
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