Chief Mechanic : John, you must wear a welding mask and safety gloves while
you are welding an iron gate. It might burn your eyes and hands.
John : You are right. I must be more careful next time.
Chief Mechanic : And you should wear safety boots too.
John : Oh really!
Chief Mechanic : You will be suspended if you don’t follow rules.
John : Thank you for your advice.
Chief Mechanic : You’re welcome.