________hehasmanyfriends,heisoftenfeelinglonely.
A、AsC
状语从句的从属连词的选取。
Astothevariouspollutions,whichofthefollowingisNOTtrue?
________ in thought, he almost ran into the car in front of him.
______alittleearlier,Iwouldhavecaughtthetrain.
Thepolicemancameuptothelonelyhousewiththedoor_______,_______thereforawhileandthenenteredit.
Which of the folloing is NOT included in the fabled Five Mountains in China?
