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    精英家教网 > 高中英语 > 题目详情
    If a computer crashes,you will lose the file you _____ on unless you save it regularly.?   
    A．are workingB．work?
    C．will workD．worked?
     A
      考查时态。依据常识可以知道，电脑瘫痪，之前的文件不会丢失，而即将进行的文件也不可能丢失，所以可以排除C、D两项；再依据后文的save it regularly可知，这些文件应该是正在进行的文件，所以用进行时态。
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