The harmful effects of smoking is more than you can imagine. When I was young, I didn't know much about the harmful effects of smoking. I didn't know, for example, that it could do terrible (1) _______ to your heart and lungs or that it was (2) ________ for smoking couples to become pregnant. I certainly didn't know their babies may have a smaller birth  (3)_________ or even be  (4)___________ in some way. Neither did I know that my cigarette smoke could (5) __________ the health of non-smokers. However, what I did know was that my girlfriend thought I (6) _______ terrible. She said my breath and clothes smelt, and that the ends of my fingers were turning yellow. She told me that she wouldn't go out with me again (7) ________ I stopped! I also noticed that I became  (8)__________  quickly, and that I wasn't (9) _________ sport as much. When I was taken off the school football team because I was unfit, I knew it was (10) ______to quit smoking.