—I’m losing my eyesight, I’m afraid.
—To finish this book, you ______ in front of your computer too long.

A．workB．a(chǎn)re workingC．have been workingD．worked

C

解析試題分析：考查時態(tài)。根據(jù)時間狀語too long說明很長一段時間以來一直在做某事，故使用現(xiàn)在完成進行時。句意：—恐怕我的視力在下降。—為了寫完這本書，你一直在電腦之前工作了太長的時間。根據(jù)句意說明C正確。
考點：考查時態(tài)
點評：時態(tài)的考查要抓住文章的關(guān)鍵的時間狀語，如本題的too long和上下文的語境，

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