题目内容：

听下面一段独白，回答以下小题。

1.What is the purpose of the talk?

A.To present a disagreement. B.To introduce a lecturer. C.To recommend a book.

2.Where is Russel working currently?

A.In Oxford. B.In Chicago. C.In Virginia.

3.What does Russel think of sleep?

A.It’s rarely researched. B.It’s rather inconvenient. C.It’s of great significance.