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 |
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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 |