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I am ashamed, sir, that I wasted the many hours I should have studied in class.

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I am ashamed, sir, that I wasted the many hours I should have studied in class.

I am ashamed, sir, that I wasted the many hours _____ I should have studied in class.

       A. while              B. as                  C. once                     D. when

试题答案

D

标签：thewastedhoursmanyashamed

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