Question

His essay, ______ many times, was brief and to the point and therefore won the first prize in the writing competition.

  A. polishing up                                         B. having polished up   

  C. to be polished up                                   D. having been polished up

Answer 1

D

解析:

考察非謂語(yǔ)動(dòng)詞的用法。由于polish up和His essay之間的邏輯關(guān)系為動(dòng)賓關(guān)系，非謂語(yǔ)動(dòng)詞的動(dòng)作發(fā)生在主句謂語(yǔ)動(dòng)詞之前，所以應(yīng)用完成式分詞的完成被動(dòng)形式作原因狀語(yǔ)。