Now the air in our city is _______ than it used to be.Something must be done to stop it.
Look, Tina is waiting _________ the bus stop.
---Is it polite to speak and laugh loudly ______ ?---No, I don’t think so.A. in public B. at least C. on time
This photo reminds me ____ the days when I worked ____ the farm with my classmates.
Peter usually gets up early ____ the morning.
You must ride your bike ____ the right side of the road.