____in thought,I didn't know what happened at that time.A.LostingB.LostC.To loseD.I lost

____in thought,I didn't know what happened at that time.A.LostingB.LostC.To loseD.I lost
____in thought,I didn't know what happened at that time.
A.Losting
B.Lost
C.To lose
D.I lost

____in thought,I didn't know what happened at that time.A.LostingB.LostC.To loseD.I lost
lost
状语从句的省略.主语相同,可以省略从句主语,要改变动词形式.
主动变ing
被动变ed
这个是被动,变成lost就可以了.