The harmful effects of smoking is more than you can imagine. When I was young I didn't kn

问题补充：

The harmful effects of smoking is more than you can imagine. When I was young, I didn know much about the harmful effects of smoking. I didn 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 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 go out with me again (7) I stopped! I also noticed that I became (8) quickly, and that I wasn (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

答案：

(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。