________ Chai Jing said in her video about the smog has caused public concern.
In my opinion, learning is lifelong and the more knowledge you get, ________ .
—Ann is in hospital.— Oh, really? I ______ know. I _______ go and visit her.
—What are you going to do this weekend?— . If time permits, I may go to Shanghai with my friends.
Little Johnny felt the bag, wondering what it ________ .
His brother ___the army since 2012.