I am a kind of fruit, green outside and red inside. What am

谜题：I am a kind of fruit, green outside and red inside. What am I ?
 
（参考答案及解析在第二页）

 
谜底：a watermelon（西瓜）
 
难度：★★★
 
谜语提示：……

上一篇：Why is six afraid of seven?
下一篇：传飞客(打一英文单词)