根据短文内容和括号内所给汉语意思，写出空白处各单词的正确形式（每空一词）。
Once upon a time, a good-looking hawk(鹰) lived in a tree alone. He felt ____ (孤独的) because he had no friends.
One day, he saw a beautiful she-hawk and ____ (掉落) in love with her, so he wanted to get ____ (结婚) to her. But the she-hawk ____ (拒绝), because he had no friends. "Will you be with me if I make three friends?" he asked. She answers, "Yes."
The hawk flew to look for friends. Along the way, he met some animals, ____ (包括) a fox, a tiger and a ____ (巨大的) bear. He asked them if they could make friends with him. They said, "Of course. Call us when you are in ____ (麻烦) and we shall come to your side."
The hawk was very happy. He flew back and became the she-hawk's husband. Some months later after their marriage, they got two baby hawks and had a happy life.
One day, two hungry hunters (猎人) came and sat under that tree. They had ____ (没有什么) to eat. Suddenly, they heard the baby hawks crying. And then they made a ____ (决定) to catch them to eat.
The parent hawks became worried. So they had to turn to their friends and told them the ____ (整个的) thing. With their help, the two hunters ran away, and the babies became safe.
The hawk thanked his three friends. He found that the she-hawk was very smart, and the babies became safe.
The hawk thanked his three friends. He found that the she-hawk was very smart in advising him to make friends before marriage.
轴上，半径为1，且过点（1，2）的圆的方程为（ ）