1 . 听下面一段独白，回答以下小题。
1. What is the main topic of the talk?

A．Details of ancient history.

B．Stories of 20th-century explorers.

C．Development of modern technology.

2. How does the speaker describe Percy Fawcett?

A．Energetic.

B．Mysterious.

C．Crazy.

3. When did Percy Fawcett start exploring?

A．Around 1850．

B．Around 1900．

C．Around 1950.

4. Who wrote The Lost World?

A．Percy Fawcett.

B．Joao da Silva Guimaraes.

C．Arthur Conan Doyle.