Ⅰ. 根据句意及首字母提示完成单词(10分)
1. If we want to keep healthy, we should have a healthy, balanced d _____ .
2. Many d _____ are caused by bacteria (细菌).
3. I s _____ a big office at school with twelve other teachers.
4. If Joe can’t attend the meeting, I could go i _____ .
5. Tony is i _____ in watching, studying, protecting the wild birds.
