.If a computer crashes, you will lose the file you unless you save it regularly.A. are wor

发布时间：2020-08-16 09:34:17

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If a puter crashes, you will lose the file you     unless you save it regularly.
A. are working
B. work
C. will work
D. worked

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(答案→)A. are working
B. work
C. will work
D. worked
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