单项选择题

A．work
B．housework
C．duty
D．business
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单项选择题
Where does this conversation take place
A． On a train.
B． In a classroom.
C． In a bar.
单项选择题
What does Prof. Jamison’s assistant do
A． Make up homework problems.
B． Do research in the library.
C． Grade homework sets.
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