Mary loved small animals．One morning while she was walking in the forest, she found 1 weak birds in the grass．She took them home and put them in a small cage(笼子)．She cared them with love and the birds both grew 2 ．They thanked her 3 a wonderful song every morning．
But something happened one day．Mary left the door of the 4 open．The larger bird flew from the cage．She thought that it would 5 ．As it flew close, she grasped(紧抓)it．She was very excited to catch it． 6 she felt strange．She opened her hand and looked sadly at the 7 bird．Her great love had killed the bird!
The other bird was moving back and forth(来回)in the cage．Mary could 8 its great need for freedom(自由)．It wanted to fly into the clear and blue 9 ．At once, Mary took the bird 10 the cage and let it fly away．The bird circled once, twice, three times…
Mary enjoyed watching the bird flying and singing 11 ．Suddenly the bird flew 12 and landed softly on her head．It sang the 13 song that she had ever heard．
The easiest way to lose love is to hold it too tight．The best way to keep love is to 14 it wings(翅膀)．