题目内容
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 |
B
解析试题分析：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。
考点：考查动词不定式的用法。
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