单项选择题

A．Doctor and patient.
B．Policeman and car driver.
C．Librarian and student.
D．Post clerk and customer.
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单项选择题
A．They smile to cover embarrassment.B．It is an unusual and even suspicions behavior.C．They smile to show politeness.D．It is an expression of pleasure.
A．They smile to cover embarrassment.
B．It is an unusual and even suspicions behavior.
C．They smile to show politeness.
D．It is an expression of pleasure.
单项选择题
A．He hasn’t decided on a topic for his composition.B．He has fallen behind others in English class.C．He hasn’t made up his mind as to what to write a bout.D．The look he borrowed will be due tomorrow.
A．He hasn’t decided on a topic for his composition.
B．He has fallen behind others in English class.
C．He hasn’t made up his mind as to what to write a bout.
D．The look he borrowed will be due tomorrow.
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