法定保险通常具有强制性和全面性的特征。法定保险的保险关系产生于：

A．被保险人自行选择

B．保险人与被保险人之间的合同行为

C．保险经纪人与保险人协商

D．国家和政府的法律效力

Passage One

Which of the following is the most important factor in a successful marriage

A．Family background.

B．Chemistry.

C．Age difference.

D．A wise choice.