At the beginning of a speech, it is very important to grab the audience’s attention and make them interested in you have to say.
A. which
B. what
C. that
D. who
网友回答
A. which
(答案→)B. what
C. that
D. who
解析：考查名词性从句。句意“在一次演讲的开始，吸引观众的注意力很重要，并让他们对你要说的产生兴趣。”in后跟的是宾语从句，从句缺少宾语，用what指“说”的内容。故选B。