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:

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lost in though陷入沉思。