单项选择题

A．Make up homework problems.
B．Do research in the library.
C．Teach an introductory economics course.
D．Grade homework sets and record them on the computer.
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单项选择题
A．It should be no place for play.B．It should be near a common area.C．It should have no TV sets and computers.D．It should have a computer for study.
A．It should be no place for play.
B．It should be near a common area.
C．It should have no TV sets and computers.
D．It should have a computer for study.
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J
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