________ in thought, he almost ran into the car in front of him.
C
这里分词短语的意义应为“Ashewaslostinthought”，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。
The girl was lucky enough to _______ the bad men and ran away.
_______ in thought, he almost ran into the car in front of him.
Whycouldn’tyou________ananswerwhenIaskedyouwhyyouwerelate?
The policeman came up to the lonely house with the door _______, _______ there for a while and then entered it.