单词拼写。
根据所给中文或音标提示拼写单词，注意其适当形式，每空一词。
1. He fell off the tree. ________, he didn't hurt himself at all. (幸运的是)
2. The twins are old enough to dress ________. (自己)
3. The boys are _________ (欢呼) for their success now.
4. I read many_________(英雄)stories when I was young.
5. If you want to keep much_________ (健康的), you'd take more exercise and eat less food.
6. At the_________ (起初)of the term, he worked hard.
7. The students spend an hour _____(练习)speaking English after class.
8. My brother is the _________ (瘦) in his class.
9. Please tell us what the_________／hait／of this building is.
10. Betty is one of the__________／win?(r)z／of the writing competition.