________ old man behind Mary is ________ university teacher.

I think our history teacher teaches us ______.— Yes, but he hasn’t come today. He doesn’t feel ______.

I am so _____ when I heard the ________ news.

You look tire.___________ working indoors you should be out for a walk.[ ]

Are you going to Beijing by air?— It’s fast, but expensive. So I’m not sure. I _____ take a train.