2015-2016学年 外研版 必修4Module 2 Traffic jam grammar课件 (4)
2015-2016学年 外研版 必修4Module 2 Traffic jam grammar课件 (4)第3页

 Function -1.Observation(5m) What do they have in common? 

You should check the cab has a business permit. Make sure you ask for a receipt. It’s a good idea to have your destination written in Chinese.

Find more examples of the phrases in the passage.