完形填空。

Bob is very old. He likes eating dumplings. Every Sunday, he goes to a Chinese 1and eats dumplings2dinner. Ann is a waitress. She3in the restaurant. Ann often4with Bob, so they become good friends. Every time after Bob5for his dinner, he puts some money on the table. The6is for Ann. It's her tip. One day, Bob7Ann, "Do you want a tip or half of my lottery prize?" Ann thinks that8is telling a joke.9she laughs and says, "Half of your prize."

The next day, Bob wins the lottery and gets six million dollars. Then he goes to the restaurant and gives Ann the tip10of his lottery prize!