阅读下面的短文，掌握其大意，然后从各题所给的四个选项中选出一个最佳选项。
Long, long ago, there lived a couple who already had seven sons. They wanted a daughter, and soon they had one. One day, the father needed1 for the baby girl, so he sent the seven brothers to a well with a water jug. Once there, though, the boys began to2 and the jug fell into the well.
The boys were3 afraid to go home. They looked into the well sadly and thought of their father. "4are those naughty boys? Hours have passed. They must have5 the water. I wish they were all turned into birds!" shouted the father6. And when he looked up he saw seven birds flying away. The father was7, but it was too late. He could not take back his words.
In time, the girl grew up and8 she had brothers. She made up her mind to find them.
For years, she searched and did not stop. Finally, she found their9. To enter, she needed a special key made from a wolf-bone, which she didn't have.10 a hunter's help, she finally killed one and got the key. She11 the front door and went inside. On a table, there were seven plates and seven cups. She was not that hungry so she ate and drank a little from12 of them.
She accidentally dropped a ring that her parents had given her into the13cup. Later, the birds returned for their14. The girl hid behind the door and watched,15the seventh bird drank from his cup, something hit his mouth. The bird recognized it at once. It was his parents' ring. At that moment, their sister ran to them, and in a sudden the birds were humans again.
