请教一道英语任务型阅读题.
问题描述：
请教一道英语任务型阅读题.
短文里有一句话是：The colors of the rings are blue,yellow,black,green and red.You can find at least one of these colors in the flag of each countey in the world.
One of the colors of the rings：________.
答
blue,yellow,black,green and red
当中任意填写一个都算对,因为他要求的是五环当中的一个颜色.