Choose the best topic sentence from the four options below.

N公司经市劳动和社会保障局审批后，建立了企业年金计划，为在职员工办理了一份补充养老保险。退休后，该公司职工除可享受基本养老金外，还可拿到另外一份补充养老金。N公司加入的企业年金计划是集合计划，由T养老保险股份有限公司作为受托人和投资管理人，由G银行作为账户管理人和托管人。我国的集合企业年金最初模式是“2+2”业务模式，之后又有了“3+1”模式，与“3+1”模式并存的还有“1+2+n”的新模式。

补充养老保险计划按运作方式可分为DB计划、DC计划和混合型计划（DB和DC的混合）。所谓DB模式，就是给付确定型（defined benefit）模式的简称。DC模式是缴费确定型（defined contribution）模式的简称。认识和掌握两种模式的补充养老保险，在实际养老保险运营管理中非常必要。

美国加州公共雇员养老基金是目前美国最大的公共雇员养老基金，属DB计划，由雇主和员工分别缴纳保险费，基金采用信托运作，由基金的管理委员会作为唯一的受托人进行管理。该基金的治理结构是：全体参与者作为委托人和受益人，管理委员会作为受托人，管理委员会再与外部的资产管理人或其他服务商签订投资服务合同等，基金运作的唯一目的是实现受益人利益最大化。该基金是美国公司治理运动的最主要推动者之一，是股东积极行动的创始人，参与被投资公司（简称目标公司）的治理管理。

目前中国老年人口比例达到12%，老年人口总数超过1.6亿人。人口老龄化仍处在加速发展阶段，预计到2015年中国老年人总数将突破2亿人，2025年将超过3亿人，本世纪中叶，将达到4.37亿人。近两年中国的总人口数增长每年均未超过700万，按此趋势，人口老龄化程度和峰值将比预期来得更早，也更为严重。长寿风险与老年收入保障问题已经成为现代社会的重要社会问题。

English is now the international language for airline pilots, scientists, medical experts, businessmen and many others. Consequently, more and more people are learning it. The BBC’s English teaching programs are broadcast daily to four continents (31) ______. Films and video are on the air or used in institutions in over 100 countries. All this helps to add more speakers to the estimated 100 million (32) ______. The rush to learn English has reached even China. The main reason for the upsurge (上升) in interest is (33) ______. Unlike many other widely used languages, English can be correctly used in a very simple form with less than one thousand words and (34) ______. This was pointed out in the 1920’s by two Cambridge scholars, Ogden and Richards, (35) ______. Another reason for the popularity of English is that English-speaking countries are spread throughout the world. An estimated 310 million people in Britain, the U.S.A., Canada, Australia, South Africa, etc. (36) ______. Also in former British colonial areas in Africa and Asia (37) ______, no common language has been found which would make a suitable substitute for English. In Delhi, although nationalists would prefer to phase out (逐步停止) the use of English, the man from South India finds English more acceptable than Hindi, (38) ______. Turning from India to Africa, a similar problem exists. However reluctant African nations are to use English and, as it were, subject themselves to a kind of "cultural imperialism", there seems to be no alternative language which will do the job of communication effectively. The view (39) ______. Some teachers who have returned from overseas consider it creates a wider gap between those who are educated (40) ______. Nevertheless, in many parts of the world, the technical and scientific knowledge needed to develop a country’s resources and improve people’s living conditions, is just not available in the mother tongue.

N公司经市劳动和社会保障局审批后，建立了企业年金计划，为在职员工办理了一份补充养老保险。退休后，该公司职工除可享受基本养老金外，还可拿到另外一份补充养老金。N公司加入的企业年金计划是集合计划，由T养老保险股份有限公司作为受托人和投资管理人，由G银行作为账户管理人和托管人。我国的集合企业年金最初模式是“2+2”业务模式，之后又有了“3+1”模式，与“3+1”模式并存的还有“1+2+n”的新模式。