单选题 Sending e-mail is relatively cheap and quick. For example, a short message can be sent around the world in less than a minute. When you send an e-mail, the message waits in the person's mailbox which is located on the service provider' s server. The message waits there until the person cheeks his or her mailbox and downloads the message from the server to his or her computer.

【正确答案】利用电子邮件传递信息相对便宜和快捷。比如说，一条简短的信息在一分钟内便可传遍世界各地。电子邮件发送后，信息会储存在收信人的邮件侍服务器内，直至收信人查收信件时，才会从侍服器下载。

【答案解析】[解析] 这是一段介绍电子邮件优点的文章。“when you send an e-mail”为时间状语从句，“which is located on the service provider’s server”为定语从句，“．．．until．．．computer”为时间状语从句，译作“直至收信人查收信件时，才会从侍服器下载”。