What was the topic of the speech Mr. Bennett gave?
Bennett 先生给这个演讲什么题目?
A. It will be held at the grand ballroom.
A.它会在大宴厅举行。
B. I wish I knew.
B.我希望我知道(事实是不知道)
C. Yes, Mr. Bennett is a great speaker.
C.Bennett 先生 是个伟大的演讲家