单项选择题

Market research is usually very_________, involving thousands of people answering hundreds of questions.

A．detailed
B．details
C．detail
D．detailing
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单项选择题
I hope you''ll advise me what _________after class.
A．do
B．to do
C．doing
D．to be done
单项选择题
The boss told his secretary to _________the document for later use.
A．put away
B．turn on
C．make up
D．break out
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