4．
[1]E-mail may be the most important，unique method for communicating and developing relationships since the telephone．First of all， ．Anyone who can use a word processor can also write an e-mail message without difficulty．Secondly，it saves time and money．It costs nothing more than your time．No paper expense，no postage，no envelope expense．People find it familiar and safe because it is similar in many aspects to writing letters-but minus the annoyances of addressing envelopes，licking stamps and trips to the mail box．
[2]Of all the methods for developing relationships on the Internet，e-mail is the most common-and perhaps the most powerful．Although friendship may indeed begin in chat rooms，instant messages，blogs or other environments，these relationships almost always expand into e-mail as a way to deepen the communication．It is a more private，more reliable，less messy way to talk．Even when other online tools improve greatly by becoming more effectively visual and auditory（聽覺的）-as in video tele-conferencing-e-mail will not disappear．Many people will prefer it because it is a non-visual and non-auditory form of communication．After all，we don't see people rushing out to buy video equipment to add it to their telephone，even though that technology has been available for some time．
[3]E-mail is not just an electronic mail sent via the Internet．It creates a psychological space in which pairs of people-or groups of people-communicate with each other．It creates a situation and boundary in which human relationships can unfold．
76．What is the main idea of the text？（within 10words）
E-mail is an important，unique method for communicating and developing relationships
77．Which sentence in the text can be replaced by the following one？
People like e-mail better because it enables them to communicate even without seeing or listening to each other．
Many people will prefer it because it is a non-visual and non-auditory form of communication．
78．Please fill in the blank in Paragraph 1with proper words or phrases to complete the sentence．（within 8words）
it is easy to use
79．Please list three other ways of communication．（within 15words）
①Telephones②Chat rooms③Instant messages
80．Translate the underlined sentence in Paragraph 3into Chinese．
電子郵件為雙方或群體之間的交流溝通創(chuàng)造了一個心理空間．．
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