养老保险事务由政府直接管理的典型国家有（）
A、中国
B、加拿大
C、美国
D、瑞典
E、瑞士
参考答案：A, B, C, E
The old couple often take a walk after supper in the park with their pet dog them. [ ]
A. to follow
B. following
C. followed
D. follows
