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 bee 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.damage
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(答案→)damage
解析：
【小题1】damage 固定搭配do damage to..对…有伤害。
【小题2】 more difficult 句意：对于抽烟的夫妻来说想要怀孕更为困难。
【小题3】weight 名词短语birth weight指出生的体重。
【小题4】abnormal 形容词abnormal不正常；注意构词法ab-加上normal；指在某些方面孩子不正常。
【小题5】affect 动词影响affect。这里是指影响不抽烟人的健康。
【小题6】 smelt. 系动词smell和形容词terrible构成系表结构。因为本文是过去时，故使用smelt。
【小题7】unless 句意分析：如果我不停止抽烟，她就不和我出去了。Unless 除非…如果…不…
【小题8】breathless 形容词breathless气喘吁吁的。
【小题9】 enjoying 动词喜欢enjoy，本句是现在进行时的时态。
【小题10】 time 句意分析：现在是戒烟的时候了。