If a puter crashes,you will lose the file you on unless you save it regularly.
A. are working
B. work
C. will work
D. worked
网友回答
A. are working
B. work
C. will work
D. worked
解析: 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。