The air holds the feather back more than it ___ the stone.

He had to pause from time to time to wipe the sweat from his forehead, because the air-conditioning system _________.

I was       in the middle of my call because I had no more pennies to put in the box.

Eating too much fat can_______heart disease and cause high blood pressure.

Responsibility is one of the top qualities parents want their children to have when they _______.