A. Eating quietly without making noise. B. Sitting still without glancing at others. C. Using knives and spoons one by one. D. Taking care to keep the napkin clean. 参考答案:A 答案解析:[解析] 事实细节题。从第三段第三句The golden rule is to act silently.可知餐桌礼仪中重要的是吃饭时不要出声。所以[A]为正确答案。