What are some effective ways to get the audience involved in the middle of the speech?

1, please ask questions and participate in the discussion. You can ask them to write it on a note and pass it on anonymously or anonymously;

2. Listen to the audience's suggestions, pay attention to their voices, and understand their acceptance methods. Communicate in a language more suitable for them to understand;

3. Ask multiple-choice questions, let them make choices and drive the atmosphere.