（21） buying and selling products, e-business may also（22） other traditional business aspects. The use of electronic chat as a form of technical and customer support is an excellent （23） of this. An e-business which uses chat to supplement （补充） its traditional phone support finds a system which （24） incredible amounts of time while providing opportunities （25） through traditional support. By using （26） computer systems, for example, technical support operators can remotely （27） a customer's computer and （28） them in correcting a （29） . And with the download of a small program, all pertinent information about the hardware and software specifications for a user's computer may be relayed to the support operator directly, without having to walk a customer through personally （30） the data.
24.
A、takes
B、costs
C、wastes
D、saves
【正确答案】：D
【题目解析】：take拿走；cost花费；waste浪费；save节省。句意：电子商务使用聊天来补充找到的传统电话支持系统，节省大量的时间，同时提供机会。
