问题
选择题
One of the important lessons children learn from their parents is ________
A．how speaking politely to others
B．how to speak politely to others
C．what time speaking politely to others
D．what time to speak politely to others
答案
答案：B
题目分析：句意为：孩子们向父母学习的重要一课是怎样有礼貌地和他人说话。根据语境，这是疑问词与动词不定式连用，how表示方式方法。故选B。