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【例2】
【预览选项】
14. [A]Coca Cola.
[B]Sausage.
[C]Milk.
[D]Fried chicken.
15. [A] He has had thirteen decayed teeth.
[B]He doesn’t have a single decayed tooth.
[C]He has fewer decayed teeth than other people of his age.
[D]He never had a single tooth pulled out before he was fifty.
16. [A] Brush your teeth right before you go to bed in the evening.
[B]Have as few of your teeth pulled out as possible.
[C]Have your teeth X-rayed at regular intervals.
[D]Clean your teeth shortly after eating.
【听前预测】
14．由15、16题各选项内容可推测本文主题应该是关于牙齿保健。而本题选项都是食物或饮料，结合对文章主题的分析，本题很可能是问哪种东西对牙齿有害。根据常识，四种食物或饮料中Coca Cola最容易伤害牙齿，因为其含糖量较高。
15．选项表明本题考查的是某人的牙齿状况（是否有蛀牙）。[A]、[B]、[C]都是关于蛀牙的问题，[D]则是关于拔牙的问题，故可初步排除。
16．选项表明本题考查的是保护牙齿的正确方法。根据对前两题的分析可推知，本题很可能是关于预防蛀牙的方法，并且很可能与饮食有关。因此[B]、[C]为答案的可能性较小；而[A]、[D]为答案的可能性较大。
