听力原文：Thank you for staying tuned to Talk Tonight. Our special guest this evening is a graduate of West Point. He was a former intelligence officer and retired lieutenant general who served under two presidents. This man is also an expert on Russia and frequently lectures at universities across the nation. He is here this evening promoting his new book, Behind the Kremlin, which gives us insight on Russian politics. It is currently on the best seller's list. It's my plesure now to welcome Mr. Ivan Strand. What is the main purpose of this speech? A．To describe a book B．To promote a product C．To introduce a guest D．To announce a program
A. What B.To C.To D.To E.To
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C 解析：这个问题考查说话者的目的，这类问题强调对谈话整体的把握。通过Our special guest thi......