Julia	I’m always careful about the amount of the water I drink. 60 % of our body is water, so it is very important to drink enough water. Doctors say that a person should drink 9-13 cups of water every day.
Martin	I’m a smoker. I know it’s not healthy, but I can’t give it up. A lot of studies show that it damages our heart, lungs, stomach, etc. Also, smokers die eight years younger than non-smokers.
Alex	Regular exercise has great benefits for me. I look fit and feel more energetic thanks to it. I’m 60 years old and I run 2 kilometers every day.
Sandra	I’m careful about what I eat. I usually cook and eat at home. I try to eat fresh fruits and vegetables. I consume very little salt and sugar.
Susan	Like many coffee-lovers, I can’t start the day without it.  These days, I can’t sleep well and I frequently have headaches. My doctor thinks that caffeine is the reason of my problems and I should drink less coffee, but I don’t know how I can do it.

Who has an unhealthy habit?