_______ in thought, he almost ran into the car in front of him.
A、LosingC
這里分詞短語的意義應為“Ashewaslostinthought”，意為“由于陷入沉思”，這兒填入過去分詞短語，表示一種狀態，用作原因狀語。
Thepolicemancameuptothelonelyhousewiththedoor_______,_______thereforawhileandthenenteredit.
______alittleearlier,Iwouldhavecaughtthetrain.
______thenewplancanbecarriedoutwillbediscussedatthemeetingtomorrow.
Heshookhandswiththevisitors________astoconveyhisapology.
TheWesternCouncilforTravelResearchin_______employedthetermvisitor.
