．阅读短文，从方框中选择适当的动词，并用其适当形式填空。有的需要加助动词或不定式符号 (每词限用一次)。

One day, Daniel and his uncle Bob went to the store together. Uncle Bob gave Daniel 1$ and told him ___________ whatever he wanted. Daniel picked up two chocolate candy bars which ___________ 50 cents each.
As they were leaving, Bob said when he was a child, he could buy five candy bars with 1$. “You see, Daniel, the price of all things usually rises as time __________ by. That’s why 1$ made today is more valuable than 1$ made one year later. This__________ the ‘Time Value of Money’. Do you understand?” But Daniel really didn’t understand.
“Yes see, Daniel. When I was a kid, I could buy five of them. But now You can only buy two because the price___________ to 50 cents. In other words, the value of 1$ has dropped over years.” Daniel nodded his head.