听下面一段独白，回答以下小题。
【小题1】Where can one probably see a spider?

A．23,000 feet above sea level.

B．2,200 feet below the earth’s surface.

C．On Mount Qomolangma.

【小题2】What can we conclude from the talk?

A．Spiders deserve more respect of us.

B．Spiders are dying out of the earth.

C．People should raise spiders to destroy insects.

【小题3】Why would human life be in danger if there’s no spider?

A．Because spiders catch and eat insects.

B．Because spiders can protect our environment.

C．Because spiders can help reduce air pollution.