14．The puzzling expression suggested that he didn't understand the question．把puzzling改成puzzled．

分析 感到困惑的表情說明他沒有理解這個問題．

解答 答案是：把puzzling改成puzzled；本題考查puzzled/puzzling的區(qū)別；說明"（人）感到困惑的狀態(tài)"用過去分詞，說明"（物） 令人困惑的特性"用現(xiàn)在分詞；題干中需要的是expression（表情）的定語，說明（他）感到困惑的，用過去分詞；故要把puzzling改成puzzled．

點評 句子改錯要在理解句子結(jié)構(gòu)的基礎(chǔ)上從詞語搭配、詞性、單復(fù)數(shù)、時態(tài)、非謂語動詞等方面進行綜合考慮，分析可能存在的錯誤；

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