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’s too expensive.B．It isn’t needed.C．It should have been built earlier.D．A college would be better.
A．It’s too expensive.
B．It isn’t needed.
C．It should have been built earlier.
D．A college would be better.
单项选择题
A．It should be higher.B．It’s satisfied.C．It’s the same as the post office pays.D．It varies according to the person’s experience.
A．It should be higher.
B．It’s satisfied.
C．It’s the same as the post office pays.
D．It varies according to the person’s experience.
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