单项选择题

A．2.
B．3.
C．4.
D．5.
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单项选择题
A．They set their own exams.B．They select their own students.C．They award their own degrees.D．They organize their own laboratory work.
A．They set their own exams.
B．They select their own students.
C．They award their own degrees.
D．They organize their own laboratory work.
单项选择题
A．Take a break.B．Go to work.C．Do the other problems.D．Keep trying.
A．Take a break.
B．Go to work.
C．Do the other problems.
D．Keep trying.
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