材料一： “养老”在中国古代的礼制中有着重要的地位。据《礼记·王制》记载：“殷人养国老于右学，养庶老于左学；周人养国老于东胶，养庶老于虞庠。”汉代，统治者强调以孝道治理天下。《王杖诏书》中规定：70岁以上的老人，朝廷赐给手杖。凭此杖，老人可享受600．石俸禄的官吏待遇。同时在乡里设三老，选地方年长且德高望重者任职，负责教化地方，解决民间纠纷。唐宋以后，保持了由皇帝宴请老人的习俗，称为“观酺”。如康熙六十大寿时，举办“千叟宴”，宴请天下老人。同时在全社会旌表高寿老人，对于年过百岁者，“照例给予建坊银，赠‘升平人瑞’匾额”。

——摘编自刘松林《古代中国的养老制度》

材料二： 现代社会保障制度发源于德国。德国俾斯麦时期，分别于1883年、1884年、1889年颁布了疾病、工伤、老龄和伤残三项法案，建立了三项保险制度。这一立法颁布后，很快被其它国家纷纷效仿。西方各国的养老保险，既有政府强制实行的基本养老保险，也有企业实施的保险，以及个人自愿参加的商业保险。1935年，美国通过了《社会保险法》，养老保险覆盖了95%的工薪阶层。英国在二战后实施了全民保障、全面保障。英国居民个人一生中都要与社会保障制度发生或多或少的联系，国家强制所有在毕业离校年龄和退休年龄之间的公民参加养老保险。

——摘编自赵书博《西方国家养老保险制度研究及借鉴》

    Say the words “reality TV” and the show that comes into most people's minds is Big Brother____ There have been varieties in more than seventy countries. The basic form is simple: put a group of strangers into a house, record everything they do and watch how they live together.

    ____A similar show, the Real World, was broadcast in 1992 on MTV. But the form really became popular with the success of Big Brother, and it was copied again and again____ For examples, in wife Swap, a mother went to live with a family of strangers and tried to run their home.

    So what makes these shows so attractive? As we all know, living with people you don't know is full of pressures and personality problems are common____ A TV presenter thought it was all about relationships and real people and if you were not interested in reality TV, you were not interested in people.

    But is it healthy to be this interested in other people's private life?____Not everyone prefers such shows, including the first winner of Big Brother, Bart Spring. He said he wasn't a fan of the programme or of people becoming famous for being stupid.

A. In similar shows, competitors were sent to different places, being with strangers.

B. And what kind of people want to appear in front of TV cameras twenty-four hours a day?

C. Competitors often have to share tasks and this also brings disagreement.

D. Love it or not, the programme is worldwide popular.

E. Actually the idea wasn't original.

植树造林可以防风固沙，增加降水量，可以美化环境，这说明（   ）。