单项选择题

The interviewee is not self-employed mainly because

A．his wife likes him to work for a firm.
B．he prefers working for the government.
C．self-employed work is very demanding.
D．self-employed work is sometimes insecur
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单项选择题
The significance of the finding is that
A．people now know the number of chimpanzees is much smaller than expected.
B．it may make it possible for scientists to discover new ways of treating AIDS.
C．it proves some deadly human diseases can also be transmitted to wild animals.
D．it will soon help the scientists develop a vaccine that prevents the AIDS virus.
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