根据句意和空缺处所给首字母写单词。

1. —What's that in E________?    

    — It's an egg.

2. —What is your f___________ color?         

    —Red.

3. Her legs are long, but my legs are ___________.

4.—Mike, my book is lost(丢失), Please help me f_______ it .   

   —OK.  

5. —Is this eraser y________?     

      —Yes, it's mine.