背话题佳句：
1.In the last decades, it is advances in medical technology that have made it possible for people to live longer than in the past.
在过去的几十年间，是医疗技术的进步使得人们比过去活的时间更长成为可能。
2.Inventions are created every day because people would like to make life easier.
发明每天都被创造着，因为人们想让生活变得更加容易。
3.We should focus our efforts on cloning animals and stem cells to be used in medical research.
我们应该把我们的努力放在克隆动物和能用于医学研究的干细胞上。
4.There is no doubt that we benefit a lot from the scientific advancements in many different ways.
毫无疑问，我们以许多不同的方式受益于科学的进步。
5.Thanks to the development of science and technology, human society has enjoyed continuous prosperity and more convenience.
多亏了科学技术的发展，人类社会享有了不断的繁荣和更多的便利。
6.With the development of the Internet, many individuals favour online shopping because it is more convenient and can save shoppers’ time.
随着互联网的发展，很多人喜欢网上购物，因为它更方便而且能节省购物者的时间。
背话题词：
1.keep up with 跟上……的步伐
2.come into being 产生;形成
3.on a large scale 大规模地
4.be exposed to 接触;面对
5.be up to 取决于;符合
6.lower the cost 降低成本
7.be faithful to 忠于
8.be based on 基于
9.under control (被)控制住
10.out of control 无法控制
