第三部分阅读理解（共20小题；每小题2分，满分40分）
阅读下列短文，从每题所给的四个选项（A、B、C和D）中，选出最佳选项，并在答题卡上将该项涂黑。
In the days when an ice cream sundae(圣代冰淇淋)cost much less, a 10-year-old boy entered a hotel coffee shop and sat at a table. A waitress came to his table and put a glass of water in front of him. “Miss, how much is an ice cream sundae?” he asked. “Fifty cents,” replied the waitress. The little boy pulled his hand out of his pocket and counted(数) the coins in it.
“Okay then, how much is a plain dish of ice cream?” he asked. By now, more people were waiting for a table and the waitress was growing impatient. “Thirty-five cents,” she replied rudely. The little boy again counted his coins. “I’ll have the plain ice cream,” he said.
The waitress brought the ice cream sundae, put the bill on the table, and walked away. The boy finished the ice cream, paid the cashier, and left.
When the waitress came back to that table, she began to cry as she wiped(擦) it with the wash cloth. There, placed neatly beside the empty dish were fifteen cents.
You see, the little boy couldn’t have the sundae because he wanted to have enough coins to leave her a tip. The waitress regretted having treated the little boy like that. And from that, she learned that she should treat all her customers well.
1. Why didn’t the little boy have an ice cream sundae?
A. Because he didn’t have enough money for one.
B. Because he liked a plain dish of ice cream better.
C. Because he wanted to have enough coins to leave a tip.
D. Because he was told not to have such an expensive ice cream.
2. When the little boy ordered a plain dish of ice cream, the waitress looked ______.
A. happy    B. surprised    C. impatient     D. ashamed
3. We infer that the waitress cried most probably because_____.
A. she had never received a tip before
B. she was touched by the little boy’s deed
C. she knew the little boy wouldn’t come back again
D. the boy was too generous
4. According to the last paragraph, what did the waitress regret?
A. Not having offered the little boy an ice cream sundae.
B. Not having asked the little boy for more money.
C. Not having treated everybody the same.
D. Not having treated the little boy well.