work safely. David: I know safety comes first in the construction industry. Paul: That’s seriously true. Before you enter the site, remember to first put on
1. Warming up
1. Where can you see the above safety signs? For example, public places such as cinemas and restaurants, and workplaces such as factories and construction sites.
保护你免受危害。 （穿戴好PPE后，戴维跟随保罗来到工地） 保罗：你看到工具箱了吗？在使用前，确保工具都完好。一个小错误就可能会造成严重的事故。 戴维：我明白了，谢谢您。我今天学到了很多。
2. Listening & Speaking
3. Complete the dialogue with the expressions in the box. Then listen and check. 用方框中的短语完成对话。然后听录音并检查是否正确。
(Mr Brown, a supervisor, is now speaking at a meeting.) Good morning, everybody. We are here today to talk about safety in our workplace. Even though we have done a lot to avoid hazards, we still find certain risks around us. First, the fire extinguisher on the left-hand side of the door has not been refilled, and this could be disastrous in case of an emergency. So, have it refilled right now. Second, a switch on the back wall is broken. It could cause a power failure, an electric shock or even a fire. Therefore, it should be replaced immediately.
