What are the three functions of the conclusion of a speech? ( ) A.To signal the end of the speech B.To summarize the main points in the body. C.To reinforce the central idea of the speech D.To signal the beginning of the speech

What are the three functions of the conclusion of a speech? ( ) A.To signal the end of the speech B.To summarize the main points in the body. C.To reinforce the central idea of the speech D.To signal the beginning of the speech

正确答案：ABC