What is said about people who are 100 years old or older in the United States? A.They are still capable of working. B.Their population increases rapidly. C.They pose as a burden to the family. D.They like taking adventures.
A.They B. B.Their C. C.They D. D.They E.
【参考答案】
B 解析：该句提到，根据美国人口普查局的资料，美国的百岁老人已从1990年的38,300人增长至2009年的96......