When today's college graduates get together for a reunion someday, they may decide to do it by computer. That's because right now, nearly one in five college students takes at least one class online, according to a new survey. For professors, the growth of e-learning has meant a big shift in the way they deal with students. Take professor Sara Cordell of the University of Illinois-Springfield: Her day doesn't end at 6 p.m., as it does for some college professors. Cordell sits at her computer in her campus office to chat with a half-dozen students gathered in front of their screens: One is in Tennessee, another in California's central valley, another in Ohio. They're all here to talk about Thomas Hardy's 19th-century novel Tess of the D'Urbervilles. Cordell has a microphone hooked up to her PC, and her students listen from home. All but one of them type their responses, which appear in chat-format on Cordell's screen. The process looks kind of awkward—the natural flow of a regular class is missing, as responses arrive onscreen in a digital flood. But at second glance, there's something else here not seen in a regular college class: All of the students are paying attention and all are engaged. Cordell, who is in her 50s, has been teaching offline for 25 years; online for four. She said she was initially skeptical about how meaningful an English course could be online. But now she's a convert. Online classes conducted in real time have a special kind of immediacy, Cordell said. "They're right there. They're listening. And they like talking to each other, typing to each other. That, I think, is a big attraction, because they get to engage real time with the other students as much as with me," Cordell said. After two hours of discussion, Cordell signs off. But the class actually never goes to sleep. The students, including a mother of six, will keep the conversation going. This is known as the asynchronous part of the class, and it happens on an online education content management system, where written assignments are posted. That means the work never stops—and many instructors say teaching an online class is more work.
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在21世纪初，我国出现了免费的
地铁报
(subway newspaper)。北京、上海、广州等大城市都有自己的地铁报。这些报纸通常在上班高峰期时在地铁站里发放。越来越多的人因为这些地铁报而重拾文字阅读的习惯。地铁报之所以受欢迎是因为它们非常了解
受众读者
(target reader)的需求，及时为他们提供一些
名人
(celebrity)动态、娱乐资讯和当地新闻，文章简短且配有丰富的图片。
太空垃圾(space trash)是指那些绕着地球飞行的无用处的人造物体。这些物体在太空中不断碰撞，产生更多的太空垃圾，不仅给航天事业带来了巨大隐患，而且还污染了宇宙空间，给人类带来灾难。目前移除太空垃圾的方法主要有自然移除和人为移除，但效果都不理想。最好的方法就是从源头杜绝卫星成为太空垃圾的可能性，只有这样才能保证人类航天事业的可持续发展。
很多人将烟花(fireworks)和节庆联系起来。放烟花是中国庆祝新年重要的一部分。在中国传统文化中，烟花被用以驱赶邪恶的鬼魂。烟花在中国的发展历史悠久，其发明可以追溯到2000年前。传说有个厨师在烹饪时偶然弄出了有趣的火花，通过数代中国人的努力，最终把烟花发展了起来。如今，由于燃放烟花污染环境，环保烟花的研究和开发已经展开。
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新中国成立后，中国政府一直致力于提高女性的社会地位。经过多年的努力，女性群体在社会各个领域产生了不可忽视的力量。近年来，越来越多的女性在政府部门任职，参与的国家政务活动也明显增多。据最近的一份调查数据显示，大约每3位企业中高层管理者中就有1位是女性。此外，女性在家庭决策中也扮演着越来越重要的角色。
根据
全国老龄工作委员会
(the China National Committee On Aging)的数据来看，到2053年，中国60岁及以上的老人数量预计会从目前的1．85亿一跃变为4．87亿，或者说是占总人口的35％。扩张的比例是由于寿命的增加和
计划生育政策
(family planning policies)限制大部分城市家庭只能生一个孩子。快速老龄化对社会和经济稳定造成了严重威胁。
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河边有一所老房子。
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去年三星在中国销售了3000万台设备，市场占有率达到17．7％。
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Forthispart,youareallowed30minutestowriteashortessaybasedonthepicturebelow.Youshouldstartyouressaywithabriefdescriptionofthepictureandgiveyourcomments.Youshouldwriteatleast120wordsbutnomorethan180words.
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皮影戏(shadow play)是中国的一种民间艺术，拥有悠久的历史。
BSection C/B
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