BEC初级作文指导2_BEC初级

    网友三:
    dear all:
    the file system will shtudown due to system maintainance next friday.
    it will take a full day to finish this job.
    please do not acccess the file server that day and backup your files one it.
    名师修改意见: 
    够干练了,语法错误多。 be shut down
    去掉
    access to
    on it?
    网友作文四:
    from: office manager
    to: all staff
    subject: upgarde of computer system
    our computer system need to be upgraded, we have arranged the contarctors to upgrade the them 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.
    名师修改意见: 
    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.