读下面一段短文，根据上下文意思，用括号内所给词的正确形式填空。并将答案写在文

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    More and more people ________ the life with computers. Using computers you can send E-mail  ________and easily．You are able to send a letter with pictures and sounds to someone，anywhere in the world without putting a stamp，E-mail can send its message to the other side of the world in seconds. E-mail is easy to use and it _______ time and money. It services for twenty-four hours．So it doesn’t matter if your friends are in bed when you send E-mail to them，or you are seeing a film at the cinema when they send E-mail _______
Can you imagine the future without teachers but computers? Students will teach themselves in the schools in the future．Computers help students develop their own ways of learning. Students will follow the learning programs by looking at online libraries and watching lessons by world—class teacher. If they don’t understand something，they will ask other students ________or E-mail their teachers．Computers are becoming more and more popular indeed(真正地)．