单项选择题

A．Teacher and student.
B．Doctor and patient.
C．Manager and office worker.
D．Travel agent and customer.
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单项选择题
A．Go through a health cheek.B．Take little luggage with them.C．Arrive early for boarding.D．Undergo security checks.
A．Go through a health cheek.
B．Take little luggage with them.
C．Arrive early for boarding.
D．Undergo security checks.
单项选择题
A．Most of them have a long history.B．Many of them are specialized libraries.C．They house more books than any other university library.D．They each have a copy of every book published in Britain.
A．Most of them have a long history.
B．Many of them are specialized libraries.
C．They house more books than any other university library.
D．They each have a copy of every book published in Britain.
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