Sometimes what really annoys the presenters?

Good presenters rarely ramble. They usually try to be as ________ as possible.

Why do many presenters fear the Q&A session?

中国大学MOOC: In presentation, presenters may have a feeling of disassociation because of _____.

中国大学MOOC:"In persuading people to take action for or against something, presenters use _____ to appeal to audience’s emotions.";

中国大学MOOC:"Many presenters don’t see the power of a closing. Without summarizing the major points, they make an __________ ending by saying “That’s all. Thank you for your time. Any questions?”";