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.