单项选择题

The need for television viewing guides is supported by study that shows that viewers tend not to select programs by ________ switching the dial.

A．independently
B．randomly
C．attentively
D．timely
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单项选择题
He ________ so much work that he couldn't really do it efficiently.
A．put on
B．turned on
C．brought on
D．took on
单项选择题
The exhibition is designed to ________ further cooperation between the two countries.
A．magnify
B．contribute
C．facilitate
D．necessitate
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