周末Sam带着弟弟Tom去动物园。好奇的Tom问这问那。请根据他们的路线图，将下面的句子重新排序，组成一段完整的对话。(将句子的序号填在相应的括号内)
| A. Oops, the balloons takes the boy up to the sky. His grandma and the salesman (售货员) are very surprised. | B. He gets some money from his grandma. He gives the money to the salesmen for the balloons. |
| C. The boy is excited. He runs back to his grandma with the balloons in one hand and the coins (硬币) in the other. | D. A man sells balloons (气球) in the park. A boy wants to buy some balloons and he asks his grandma for some money. |
| E. He gives the coins to his grandma. He holds (拿着) the balloons in his hand. He likes the balloons very much. | F. The balloons are very cheap and they don't cost (花费) so much，the man gives the boy some coins back. |
(D)
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