听力原文：

G: What should we do if there is a fire?

B: First, telephone the fire department at once when the fire starts.

G: What next?

B: Cover your mouth with a wet towel or a wet cloth, and avoid getting into the smoke. Don’t get in a lift. If you cannot get away by yourself, it is important to hang something out of the window to attract attention as a sign of asking for help.

G: I see. Thank you.

Question: What should we do first if there is a fire?

参考答案：

Phone the fire department immediately.