单项选择题

Which of the following can’t doctors do

A．They can give a person a new heart.
B．They can give a person a new brain.
C．They can put an arm back on after it has been cut of
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单项选择题
A．Secretary and manager.B．Waitress and customer.C．Guide and tourist.
A．Secretary and manager.
B．Waitress and customer.
C．Guide and tourist.
单项选择题
A．Every few days.B．Every few weeks.C．Every few months.
A．Every few days.
B．Every few weeks.
C．Every few months.
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