________ he has many friends, he is often feeling lonely.
A、AsC
状语从句的从属连词的选取。
Themissingboyswerelastseen________neartheriver.
______alittleearlier,Iwouldhavecaughtthetrain.
Thepolicemancameuptothelonelyhousewiththedoor_______,_______thereforawhileandthenenteredit.
NeitherEnglishnorChinese________difficulttolearn.
_______inthought,healmostranintothecarinfrontofhim.
