Mary loved small animals. One morning while she was walking in the forest, she found           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      . They thanked her   a wonderful song every morning.
But something happened one day. Mary left the door of the      open. The larger bird flew from the cage. She thought that it would       . As it flew close, she grasped (紧抓) it. She was very excited to catch it.        she felt strange. She opened her hand and looked sadly at the       bird. Her great love had killed the bird!
The other bird was moving back and forth (来回) in the cage. Mary could       its great need for freedom (自由). It wanted to fly into the clear and blue             . At once, Mary took the bird      the cage and let it fly away. The bird circled once, twice, three times…
A. some              B. several                C. two
A. small             B. strong                 C. thin
A. with                 B. for                C. about
A. house             B. room             C. cage
A. come back       B. die out                C. fly away
A. Suddenly             B. Usually           C. Easily
A. living          B. interesting            C. dead
A. take                 B. feel               C. say
A. river                B. trees              C. sky
A. out of           B. out from           C. away of