D. They live longer than those in developed countries.
A. once every two years.
C. once a year.
3.According to Lee, our response to the AIDS disease is
B. a matter of little significance.
D. timely
A. better drugs.
C. more effective prevention.
5.How many people have died of AIDS so far?
B. 46 million.
D. More than 20 million.
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