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.