动名词放句首

题目

动名词放句首
“why were you so late for work today?”
"_____to the office was very slow this morning because of the traffic"
A.Driving B.To drive C.I drove D.That I drove

答案

选A.
动名词、不定式都可以作主语,但是不定式较长时,一般用it做形式主语,而把不定式放后面,如此句要用不定式表达就是：It was very slow to drive to the office this morning because of the traffic.因此,应用动名词作主语,选A.