题文
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 |
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 |
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