_______inthought,healmostranintothecarinfrontofhim.
A、LosingC
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。
Touristexpenditureshavedifferenteffectsonadestinationeconomy:salesbyfoodvendorstorestaurantsare_______effect;whiletaxifaresandairlineticketsalesare_______effect.
In1995,anaverageof_______ofdomestictravelerswentonsightseeinginChina.
Themissingboyswerelastseen________neartheriver.
Thehousewasquietinthenight,________theoccasionalcoughingfrommythroat.
Chinaisamountainouscountry.Hills,mountains,andplateauscover_______ofthetotalarea.
