阅读下面的短文，用括号内所给动词的适当形式填空（必要时可加情态动词或助动词）。
Paul 【小题1】 (make) a lot of money since he began doing his business, but he never spent any of his money. He was afraid that someone might steal it. So he wore dirty old clothes 【小题2】 (hide) his richness. People laughed at him, but he didn’t care. He only cared about his money.
One day, he bought a big piece of gold. He dug a hole by a tree and hid it in it. Every night, he went to the hole to look at his gold. He sat and thought, “A thief 【小题3】 never 【小题4】 (find) my gold.”
But a thief saw everything while Paul 【小题5】 (dig) the hole. One day, when Paul went home, the gold 【小题6】 (steal) by the thief.
The next day, Paul went to look at his gold, but it wasn’t there! This made him 【小题7】 (feel) sad. He cried so loudly that a wise old man 【小题8】 (hear) him from far away. “Why 【小题9】 you 【小题10】 (cry), young man?” He asked Paul. Paul told him everything.
“Don’t worry. I’m sure I 【小题11】 (help) you.” he said, “Get a big stone and put it in the hole by the tree.”
“What?” said Paul. “Why?”
“What did you do with your gold?” the old man asked. “I sat and looked at it every day.” Paul said.
“Exactly,” the old man said, “If you 【小题12】 (not use) it, you can do the same thing with a stone.”
Paul listened, thought for a moment and then said, “Yes, you’re right. How foolish I am! So I don’t need a piece of gold to be happy!”
