Ⅰ.根据括号内提示，写出单词的正确形式
1. George has replaced Edward as ________ (队长)of the football team.
2. Most seafood is high in protein and low in ________ (脂肪), with the exception of a few, such as the eel.
3．If you often eat ________ (unhealthy), you can become ill sooner or later.
4. I have a ________ (牙痛)because there is a cavity in one of my teeth.
5. We all trust Mr. Brown because he ________ (rare)fails to keep his promise.
