Question

__________ in thought，he almost ran into the car in front of him．

A．Losing         B．Having lost     C．Lost      D．To  

Answer 1

C

解析:

C过去分词有三个用途：（1）表示被动，如：the oppressed people（=people who are oppressed） 被压迫的人们；（2）表示完成，如：the fallen leaves （=the leaves which have fallen） 落叶：（3）表示状态，如lostin though陷入沉思。