Modern families require the food to be convenient to cook, high in _________ and low in price.
There is no greater pleasure than running on the playground, ____ after a ball.
I have told you the truth. ______ I keep repeating it?
Their relationship_______ ups and downs over the past century.
________carefully if any change occurs when doing experiments in the lab.
______ before bed, cellphones can result in a restless night.