I'm Lisa. My father is a doctor. He often drives his car to work. My mother is an English teacher. She always walks to work. She says walking is a good way to exercise. My mother also likes going shopping. She often does some shopping on Sundays. I am a student. I usually ride a bike to school, but sometimes I come to school by bus. I like watching TV. I only watch TV on Saturday and Sunday evenings.

材料一　我国已经成为世界上人口老龄化速度最快的国家之一,到2030年,我国60岁以上人口,将达到4亿人,占总人口比例将从目前的1/7上升到1/4。

材料二　2013年11月15日,中央决定放开“单独两孩”,即一方为独生子女的夫妇可以生育两个孩子。