阅读下面短文, 从每小题所给A、B、C、D四个选项中选出最佳选项。

    A man goes into a restaurant one day. He sit down at a table near the window. A waiter goes up to 1 and says, “Can I help you, sir?” “Sure.” The man asked for some  2 food. The waiter thinks the man must have a lot of money and gets all the food for him soon. When the man is having his big 3 , a boy comes into the restaurant and sits at the man's table.

    The waiter says to the man, “What would your little boy like, sir?''

    “Oh, just a chocolate ice-cream.” Then the man4and says to the waiter, “I'm just going out to buy a newspaper.  Could you please keep an eye on my boy 5 I'm back?” With these words, he goes out of the 6.

    The waiter agrees and gives the boy a big chocolate ice-cream.  The boy is happy to7the ice-cream and eats it quickly.  “Thank you for the 8.  It's so delicious!” The boy thanks the waiter and is about to leave

    “Excuse me,” the waiter stops him, “you can't go now 9 your father doesn't give the money.”

“He's not my father,” the boy says. “I don't know  10 he is. I meet him in the park nearby this morning. He says I can eat all ice-cream when I come here at 12 o'clock. ”