单项选择题

What do they think a doctor should be

A．Very easy.
B．Neither easy nor difficult.
C．Very difficult.
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单项选择题
A．
A．
单项选择题
A．A teacher and a student.B．A mother and a son.C．A manager and a worker.
A．A teacher and a student.
B．A mother and a son.
C．A manager and a worker.
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