Mr. and Mrs. Black opened a small restaurant. In order to attract (吸引) customers, they put a notice in front of the restaurant that said "Meals on the House for Three Days."
A foreign student who didn't know much English happened to pass by the restaurant on the second day. It was lunch time and he felt very hungry. "Well, here is a restaurant. I am going to have something to eat."
He walked towards the restaurant when he saw the notice. "American people are really strange. They even eat dinners on their houses. But how can I get up to the top of the house?" he said to himself.
He looked around and found a ladder against a tree nearby. He started climbing up. But as he reached the top,he heard someone shouting at him.
"Hey, what are you doing up there?" Mr. Black shouted at him. Next to him was a policeman.
"Doesn't your notice say? "Meals on the House for Three Days'? Is it just a joke?" the foreign student answered.
On hearing this, both Mr. Black and the policeman laughed. "Do you know what ON THE HOUSE means? Look it up in the dictionary," the policeman said.