________ he has many friends, he is often feeling lonely.
C
状语从句的从属连词的选取。
_______hegoes,shewillgo,andshenevercares_______happens.
Bythemiddleofthe21stcentury,thevastmajorityoftheworld’spopulationwillbelivingincities_______inthecountry.
Thepolicemancameuptothelonelyhousewiththedoor_______,_______thereforawhileandthenenteredit.