The term e-commerce refers to all commercial transactions conducted over the Internet， including transactions by consumers and business-to-business transactions. Conceptually， e-commerce does not 1 from well-known commercial offerings such as banking by phone， mail order catalogs， or sending a purchase order to supplier 2 fax. E-commerce follows the same model 3 in other business transactions; the difference 4 in the details.
To a consumer， the most visible form of e-commerce consists 5 online ordering. A customer begins with a catalog of possible items， 6 an item， arranges a form of payment， and 7 an order. Instead of a physical catalog， e-commerce arranges for catalogs to be 8 on the Internet. Instead of sending an order on paper or by telephone， e-commerce arranges for orders to be sent 9 a computer network. Finally， instead of sending a paper representation of payment such as a check， e-commerce 10 one to send payment information electronically.
In the decade 11 1993， e-commerce grew from an 12 novelty ( 新奇事物) to a mainstream business influence. In 1993， few 13 had a web page， and 14 a handful allowed one to order products or services online. Ten years 15 ， both large and small businesses had web pages， and most 16 users with the opportunity to place an order. 17 ， many banks added online access， 18 online banking and bill paying became 19 . More importantly， the value of goods and services 20 over the Internet grew dramatically after 1997.
3. A) appeared B) used C) resorted D) served 4. A) situates B) lies C) roots D) locates 5. A) on B) of C) for D) to 6. A) reflects B) detects C) protects D) selects 7. A) sends in B) puts out C) stands for D) carries away 8. A) visible B) responsible C) feasible D) sensible 9. A) beside B) over C) beyond D) up 10. A) appeals B) admits C) advocates D) allows 11. A) after B) behind C) until D) toward 12. A) optional B) invalid C) occasional D) insignificant 13. A) communities B) corps C) corporations D) compounds 14. A) largely B) slightly C) solely D) only 15. A) lately B) later C) late D) latter 16. A) offered B) convinced C) equipped D) provided 17. A) Instead B) Nevertheless C) However D) Besides 18. A) and B) or C) but D) though 19. A) different B) flexible C) widespread D) productive 20. A) acquired B) adapted C) practiced D) proceeded
1.C。考动词词义辨析，而且是考与from的搭配，有三个选项可以入选，A distractfrom分散;使分心C differ from与不同D derive from 起源;源自根据句意A、D均不符合题意，所以答案是C.
4.B。lie lied lied 撒谎，lay laid lain 放置;处于 lay laid laid 下蛋，lie in 在于，tell a lie 说谎， liar 骗子。
5.B。表示组成的四个短语consist of ，be made up for，be composed of ，be comprised of 。
10.D。考动词词义辨析， appear 是不及物动词，一般与for连用，译为呼吁admit 一般跟动名词作宾语，译为容许， 承认advocate是及物动词提倡， 鼓吹allow sb to do 允许某人做某事，根据原文判断只有D符合题意。
13.C。考名词词义辨析，community 社区，团体corp如果首字母大写Corp是公司的缩写，所以此单词是错误的;corporation 公司，企业compound混合物，化合物，此题可以通过同意替换的方法做题，下文中提到small business，与其意思相近的选项是C.
15.B。考形近词辨析，lately与recently同义，译为最近later 多长时间之后，常与时间词连用;late 晚， 迟， 最近， 在晚期，常表示晚于通常时间的;latter 指两者之中的后者，根据句意答案是B.
16.D。考动词词义辨析， offer sb to do sth向某人提供，一般表示主动的给予;convince sb of sth 或convince sb that 常用被动语态，译为使某人信服;使某人确信equip 装备， 配备，常与with连用;provide sb with sth 将某物提供给某人，provide sth for sb 为某人提供某物，根据句意所以答案选择D.
19.C。考形容词词义辨析，different 不同的flexible 的， 灵活的， 柔软的， 能变形的widespread 分布广泛的， 普遍的productive 生产的，多产的，此题根据本段中心主题句判断出答案选项是C.