3. B. it causes sleep loss
4. D. It contributes to our weight gain.
5. C. It suppresses their appetite.
6. D. Those who quit smoking.
7. B. the rising proportion of minorities in its population
8. unclear
9. family size
10. partly genet 2008年12月英语六级(A卷)阅读答案(新东方) 标签：
