第14题: [单项选择]On an average, people in America who were born in 1900 ______. A. had a life-span of 74 years B. lived a shorter but better life than those born later C. lived to 47 years of age D. lived 27 years longer than those born in 1981 参考答案:C 答案解析:由原文最后一句It has increased from 47 years for those born in l900 to 74 years l981(寿命从1900年出生的人的47岁增长到198