Helping others is a habit, ___ you can learn even at an early age.

There is _______ sugar in the bottle. Would you please go to buy ______ now?

—A lovely day, isn't it?—Yes. I love ________ when the weather is like this. Why not go out for a walk?

There is        as good as the taste of a fresh apple, especially in the fall.

 The invention of artificial hearts marked a turning point in the battle ________ heart disease.