题目内容：

阅读下面材料，在空白处填入适当的内容（1个单词）或括号内单词的正确形式。

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 coins 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   4.  (patience). "Thirty-five cents," she said   5.  (rude). The little boy carefully counted the coins   6.  . "I will have a plain ice cream," he said. The waitress walked   7.  . The boy finished the ice cream, paid the cashier and left. It was not long   8.  the waitress came back and then she began to wipe down the table and suddenly was surprised 9.  what she saw. There,   10. (place) neatly beside the empty dish, were two nickels and five pennies --- her tip!