—I’m losing my eyesight, I’m afraid.
—To finish this book, you in front of your puter too long.
A. work
B. are working
C. have been working
D. worked
网友回答
A. work
B. are working
(答案→)C. have been working
D. worked
解析：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。