I go to school ________ bus every morning.
The game has _______ meaning _______ you do your best to win.
In old China, the poor suffered from cold and hunger ________ the rich enjoyed all the good things of life.
The bus stop is just ________ the road. You can’t miss it.
Now people have come to realize ________ harmful pollution is.
Be sure _______ when you enter the cave. Otherwise, you’ll hit your head on the rocks.