网友作文三：
　　Dear all:
　　The file system will shtudown [1]due to system maintainance next Friday.
　　It will take a full day to finish this job.[2]
　　Please do not acccess the [3]file server that day and backup your files one it[4].
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　　[1]够干练了，语法错误多。 Be shut down
　　[2]去掉来源：www.examda.com
　　[3]Access to
　　[4]On it ?
　　网友作文四：
　　From: office Manager
　　To: all staff
　　Subject: upgarde of computer system
　　As our computer system need to be upgraded, we have arranged the contarctors to upgrade the them [1]on Wedesday. On that day all computers should be shutted down for a full day, so you need arrange some alternative work for that day.
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　　[1]第一: 不要重复使用前面已经用过的词；第二：指代错误，前面说的system 是单数，怎么到这里变成了them? 合成一句：as we have arranged the contractor to upgrade our computer system.
　　网友作文五：
　　All of the staff:
　　We have arranged for contractors to upgrade our computer system, so it will be shut down from 0:00,1st, Jan. to 0:00, 2nd, Jan. Please prepare alternative work for the day.
　　If you have any problem, you can contact with us at any time.
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