________inthought,healmostranintothecarinfrontofhim.
C
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。
______aretheprimarydestinationsfortheChineseatpresent.
Bythemiddleofthe21stcentury,thevastmajorityoftheworld’spopulationwillbelivingincities_______inthecountry.
WhichofthefolloingisNOTincludedinthefabledFiveMountainsinChina?
Thehousewasquietinthenight,________theoccasionalcoughingfrommythroat.