1 . 听下面一段独白，回答以下小题。
1. Why has the lake become famous in recent years?

A．It’s introduced in books.

B．A sports game is held there.

C．A singer sings a song about it.

2. Where did the journey start?

A．On the eastern shore.

B．On the frozen surface.

C．From above the lake.

3. What attracts runners to the lake?

A．The wide space.

B．The beautiful landscape.

C．The cold weather.

4. What does the speaker mainly talk about?

A．Extreme weather in Siberia.

B．The best time to visit Lake Baikal.

C．The loneliest marathon in the world.