单项选择题

A．He leads their small group discussions.
B．He advises them individually.
C．He teaches them laboratory classes.
D．He meets with them for large group lectures.
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Qiang Qiang:
单项选择题
A．She is a junior.B．She is a senior.C．She is a graduate student.D．She is a teaching assistant.
A．She is a junior.
B．She is a senior.
C．She is a graduate student.
D．She is a teaching assistant.
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