英语专业四级考试试题每日一练11

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　　Beneath each sentence there are four words or phrases marked A, B, C and D. Choose one word or phrase that best completes the sentence. Mark your answers on Answer Sheet Two.

　　11 . Arent you tired? I ____ you had done enough for today.

　　A. should have thought

　　B. must have thought

　　C. might have thought

　　D. could have thought