题目内容：
根据下面资料，回答题 Why do We Use E-mail?
Personal computers and the Internet give people new choices about how to spend their time.
Some may use this 41 (free) to share some time with certain friends or family members, butnew technology will also let them stay in closer touch with those they care about most. I know thisfrom 42 (person) experience.
E-mail makes it easy to work at home,which is where I now spend most weekends and evenings. My 43 (work) hours aren' t necessarily much 44 (short) than they once were but Ispend fewer of them at the office. This lets me share more time with my young daughter than I mighthave if she' d been born before electronic mail became such a 45 .(practice) tool.
The Internet also makes it easy to share 46 . (think) with a group of friends. Say you dosomething fun, see a great movie perhaps, and there are four or five friends who might want to hear about it. If you call each one,you may tire of 47 (tell) the story.
With E-mail, you just write one note about your experience, at your 48 (convenient), andaddress it to all the friends you think might be interested. They can read your message when theyhave time,and read only as much as they want to. They can reply when they are 49 (avail) andyou can read what they have to say when you have time. E-mail is also an 50 (expense) way tostay in close touch with people who live far away.
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