1．It is a tall tale that terrifies most young children．Swallow a piece of chewing gum and it will remain in your body for seven years before it is digested．Or so they say．An even worse tale is that swallowed gum can wrap itself around your heart．
But what does happen if you should accidentally eat a stick of gum？Chewing gum is made out of gum base，sweeteners，coloring and flavoring．The gum base is pretty indigestible-it is a mixture of different ingredients（成分）that our body can't use．
Most of the time，your stomach really cannot break down the gum the way it would break down other foods．However，your digestive system has another way to deal with things you swallow．After all，we eat lots of things that we are unable to fully digest．They keep moving along until they make it all the way through the gut（肠子）and come out at the other end one to two days later．
The saliva（唾液）in our mouths will make an attempt at digesting chewing gum as soon as we put it in our mouths．It might get through the shell but many of gum's base ingredients are indigestible．It's then down to our stomach muscles-which contract and relax，much like the way an earthworm moves-to slowly force the things that we swallow through our systems．
Swallowing a huge piece of gum or swallowing many small pieces of gum in a short time can cause a blockage within the digestive system，most often in children，who have a thinner digestive tube than adults-but this is extremely rare．
28．A child might feel terrified after swallowing chewing gum mainly becauseC．
A．their heart will be wrapped by chewing gum
B．chewing gum will stay in their body for many years
C．they believe the tall tales about chewing gum
D．chewing gum is indigestible for children
29．What happens to the food that can't be fully broken down？B
A．It remains in our digestive system forever
B．It will be eventually moved out of our body
C．It will fight against the power of the gut
D．It will stick to the gut for one or two days
30．The word"It"（in the 4th paragraph） refers to"B"．
A．the attempt
B．the saliva
C．the shell
D．the gum base
31．What would be the best title for text？A
A．Does swallowing chewing gum matter？
B．Can chewing gum be swallowed by kids？
C．How does our digestive system work？
D．Why swallowing chewing gum frightens kids？
分析 人们传言吞食的口香糖要花七八年才能消化，甚至还有传言说口香糖在在你的肚子里缠绕．然而，事实的真相是对于那些不能被消化的食物，人体的消化系统会将它们排除体外．
解答 28-31 CBBA
28．C 细节理解题．根据文章第一段第一句"It is a tall tale that terrifies most young children．"以及对第二、三句话的理解可知，答案C符合文义．B、D两项只是分别说明了tall tale的内容，故排除．
29．B 细节理解题．根据文章第三段最后两句"After all，we eat lots of things that we are unable to fully digest．They keep moving…come out at the other end one or two days later．"可知，我们吃的很多东西都不能被完全消化，一两天之后它们就会排出体内，故答案B符合文义．
30．B 指代判断题．根据对文章第四段前句The saliva（唾液）in our mouths will make an attempt at digesting chewing gum as soon as we put it in our mouths可知，我们嘴里的唾液会尝试分解我们放在嘴里的东西，所以此处的It是指第一句中的The saliva（唾液），故答案B符合文义．
31．A 标题概括题．文章第一段由一个使小孩子害怕的说法导入话题，下文是对口香糖进入肚子后会怎样的一个科学解释，由此可推知，选项A"误食口香糖要紧吗"最适合作为文章标题．
点评 阅读理解题测试考生在阅读基础上的逻辑推理能力，要求考生根据文章所述事件的逻辑关系，对未说明的趋势或结局作出合理的推断；或根据作者所阐述的观点理论，对文章未涉及的现象、事例给以解释．考生首先要仔细阅读短文，完整了解信息，准确把握作者观点．
