单项选择题

A．Meeting with his professors.
B．Doing extra work in the chemistry lab.
C．Writing papers for his classes.
D．Working overtime as a librarian.
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单项选择题
A．The size of the campus.B．The city bus system.C．The length of time for each class.D．The university bus system.
A．The size of the campus.
B．The city bus system.
C．The length of time for each class.
D．The university bus system.
单项选择题
A．Instructions.B．Medicine.C．Money.D．The draft of his speech.
A．Instructions.
B．Medicine.
C．Money.
D．The draft of his speech.
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