单项选择题

A．Less than one year.
B．Four years.
C．Five years.
D．Ten years.
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单项选择题
A．They wanted to find out tow to become wealthy.B．They wanted to find out how to live longer.C．They wanted to know what alcohol he drank.D．They wanted to know where to be given an injection.
A．They wanted to find out tow to become wealthy.
B．They wanted to find out how to live longer.
C．They wanted to know what alcohol he drank.
D．They wanted to know where to be given an injection.
单项选择题
A．1 2.B．1 3.C．1 4.D．2 3.
A．1/2.
B．1/3.
C．1/4.
D．2/3.
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