Cowan was the last man（ ）， voluntarily covering the withdrawal o

Cowan was the last man（ ）， voluntarily covering the withdrawal of his remaining comrades.
A、to leave
B、leaving
C、left
D、to have left
【正确答案】：A
【题目解析】：当被修饰词前有：the first, the second, the best, the only, the last时，其后置定语要用不定式。