People ____smoke in a public place may have to pay￥500 as a punishment.

Bill likes playing ____ guitar, but he doesn’t like singing ____.

Gases from cars are the air of our cities. [ ]

I don’t like the guest that is coming to visit this evening.　 　　　　　 —_________ you feel about him, try to be polite.　 　　　　　

We have never been to Mexico , what about Jeff —– _________. He hopes to visit it some day .