题目内容：

In the days when an ice cream cost much less, Tom, ___1.   __8-year-old boy, entered a hotel coffee shop __2.   sat at a table. A waitress put a glass of water in front of him. “How much is an ice cream?” “Fifty-cents,” replied the waitress. The little boy pulled __3._ right hand out of the pocket and studied a number of  4.   in it. “How much is a dish of plain ice cream?” he asked. Some people were now waiting for her service and the waitress grew a bit __5.    _ (patience). “Thirty-five cents.” she said __6._    (rude). The little boy carefully counted the coins __7.___.“I will have a plain ice cream,” he said. The waitress walked _8.   __ __. The boy finished the ice cream, paid the cashier and left. It was not long 9.  __   the waitress came back and then she began to wipe down the table and suddenly was surprised at what she saw. There, _10.  __  (place) neatly beside the empty dish, were two nickels and five pennies — her tip!