Danny showed us his invention (about 关于 ) Flying Donuts.
翻译：托尼给我们展示关于飞行的面包卷的发明.
加油!不明白再问!其实这是一个选择题A. called B. was called C. calling D. is called那答案是A过去分词作后置定语。托尼给我们展示他的名叫飞行的面包卷的发明