选词填空
根据短文内容，从方框中选择恰当的单词，并用其适当形式填空。
on，luck，farm，swim，leave，ugly，beautiful，he，final，feather
Mother duck gave birth to a lot of eggs. After a period(时期)of time，Baby ducks hatched(孵)one by one. Only one of the eggs hasn't hatched. The mother duck and the duckling waited. After a while，the eggshell 1. broke and an ugly duck came out. His sisters and brothers thought he was 2. and didn't like playing with him. The cock didn't love him and the wild dog bit him too. Finally，he 3. home and his mother.
4. a cold winter morning，he was ill. 5. ，a kind 6. saved him. He spent the winter at the farmer's house.
When he went 7. in the water for the first time，he saw a group of swans flying over his head. He liked the beauty of swans and their 8. . He looked down at his reflection(倒影). At this time，he found that he was as 9. as the group of swans. He found 10. from an ugly duck to a beautiful swan!

1. finally 2. ugly 3. left 4. On 5. Luckily 6. farmer 7. swimming 8. feathers 9. beautiful 10. himself