◎ 题干
Remember to save what you ________ on once in a while in case the computer suddenly crashes.
[     ]
A. work  
B. will work
C. are working  
D. worked
◎ 答案
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“Remember to save what you ________ on once in a while in case the computer suddenly crashes.[ ]A. workB. will workC. are workingD. worked…”主要考查了你对  【现在进行时】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。