[听力原文] ？？这种土豆有什么特点？（）

A．又好吃又健康 

B．价格比较便宜 

C．只在超市销售 

D．样子非常漂亮

The earliest form of artificial lighting was fire, which also provided warm and protection.

A．hot

B．sunshine

C．warmth

D．safe