WhenIwasyoung,Ididn'tknowmuchaboutthe   61   (harm)eff...

问题详情：

 When I was young, I didn't know much about the    61    (harm) effects of smoking. For example, I didn't know that   62     was more difficult for smoking couples to become pregnant. I  63    (certain) didn't know their babies may have   64     smaller birth weight or even be abnormal in some way. Neither    65    I know that my cigarette smoke could affect the health of non-smokers. However,   66    I did know was that my girlfriend thought I smelt terrible. She told me that she wouldn't go out with me again    67    I stopped. I also noticed that I became    68    (breath) quickly, and that I wasn't enjoying sport as much. When I    69     (take) off the school football team because I was unfit, I knew it was time to quit   70    (smoke).

【回答】

61. harmful                 ainly       64. a          65. did

66. What         67. unless      68. breathless     69. was taken   70. smoking

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