1 . 听下面一段独白，回答以下小题。
1. Who first recorded the sighting of the Nazca Lines?

A．A ruler.

B．A pilot.

C．A researcher.

2. Which is one of the subjects of the Nazca Lines?

A．Ancient peoples.

B．Animals.

C．Rocks.

3. What makes the Nazca Lines remain well?

A．Local climate.

B．Special techniques.

C．Humans’ protection.

4. Which is the most widely recognized guess of the Nazca Lines?

A．They were created by aliens.

B．They were created to record star changes.

C．They were created for water-related events.