A man is going to the house of a friend. It is quite far away, so he takes some sandwiches along for his lunch. As he goes along, he says to himself, "My friend is sure to give me a very nice meal. He is going to give me good wine to drink. So what's the use of these dry（干的） sandwiches?" As he says this, he throws（扔） them onto the ground.

He goes on and comes to a river. The river has become very big because of the rain in the past few years. He can't cross the river. He hopes there is a boat to take him over. So he waits and waits. He waits for a long time. Then the sun begins to set. The man says to himself, "It's dark. I can't go to my friend's house today. I must go home. " Then he starts for home. Soon he feels very hungry. He wants very much to have something to eat, but he doesn't have anything. Suddenly（突然地） he sees some dry, dirty, hard sandwiches on the road. He is very happy. He picks them up and eats them all.

Don't throw good things away. You may need them later on.