题目

— Could you tell me________? — Two years ago. A . when did you come to China B . how did you come to China C . when you came to China D . how you came to China 答案：C欧洲的一些国家，如德国、意大利，近年来人口一直处于负增长状态，引起人口老龄化等问题。下列不是人口老龄化造成的社会问题是A.就业困难 B.劳动力短缺 C.国防兵力不足 D.社会养老压力增大