答案:1. This is what most people do. This kind of ending is too abrupt and makes audience feel uncomfortable.2. Even though we have to end our presentation strongly to give audience a “take-home” message, we don’t have to end our presentation like that.3. This is the highly recommended ending. It ends very strongly and gracefully. So the audience goes out with a good memory of you as a good presenter and your ability to cover your topic well.