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—I’m losing my eyesight, I’m afraid.
—To finish this book, you ______ in front of your computer too long.
A.workB.are workingC.have been workingD.worked
C

试题分析:考查时态。根据时间状语too long说明很长一段时间以来一直在做某事,故使用现在完成进行时。句意:—恐怕我的视力在下降。—为了写完这本书,你一直在电脑之前工作了太长的时间。根据句意说明C正确。
点评:时态的考查要抓住文章的关键的时间状语,如本题的too long和上下文的语境,
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