Set rules for questions at the beginning (e.g. save questions for the end, or ask questions whenever you like). Remember: when planning your presentation, ensure you have sufficient time to cover everything by building in time for questions.
What to Say When You Don’t Know the Answer 当你不知道答案的时候,要说什么
Honesty is the only policy when presenting to a group, and no one can know the answer to every question. It’s how we deal with this situation which gives us confidence to accept there will be questions we don’t know the answer to.
Always compliment the questioner in a sincere way. ‘That’s a very good question. I’ve never thought about it that way. Does anyone here have any ideas on that?’ You might also combine this technique with ‘I’ll get back to you.’