the "No smoking" signs have existedfor long in public places, heavy smokers oftenthem and lightup cigarettes

I set out to ___________ LiuMing.

I don’t believe you. What you said just doesn’t ______.

Are the two boys in this photo_______ volleyball— No, they aren’t. They are_______ tennis.

are you busy with—The conference _____in our city next week,as you know.