_____in thought, he didn't notice the car in front of him.

因为这是过去发生的事情，表示完成的动作，用过去分词
。同时也是固定搭配
_____ in thought, he didn't notice his teacher coming into the classroom at all.

[ ]

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

你把答案也写出来呀

填Lost
固定搭配

填lost。意思是陷入沉思

_____in thought, he didn't notice the car in front of him.
选A不行。因为没有它呢。