单选题
1.________ in thought,he almost ran into the car in front of him.
A.Losing
B.Having lost
C.Lost
D.To lose
正确答案:C
答案解析:这里分词短语的意义应为“As he was lost in thought”,意为“由于陷入沉思”,这儿填入过去分词短语,表示一种状态,用作原因状语。