1.Losing a baby tooth can be fun for a kid.You can put it under your pillow and look forward to finding some money there in the morning.And then you can watch your new permanent(永恒的) tooth grow in its place.
But if a permanent tooth falls out,that's a problem.There isn't another one under the gum(齒齦)that can replace it.Unluckily,this happens to some older people.And if permanent teeth fall out or need to be pulled,an older person might need dentures.
Dentures,known as false(假的) teeth,are a set of replacement teeth for any teeth that are missing.There are partial dentures,which take the place of only a few teeth and prevent the others from changing position.If all the teeth are gone,the person would need complete dentures,which replace every tooth in the mouth.
Dentures can cause pains at first and take little time to get adjusted to.They also need special care.They should be brushed daily with a special denture brush and cleanser and soaked(浸泡) in denture solution(溶液) when not in the mouth.
Dentures are important for the old because,without teeth,it's hard to smile,talk,and eat properly.But it can be a little weird if you see someone take out his or her dentures.It can also be strange to see someone,like a grandparent,without dentures in because he or she won't have any teeth.Try not to make fun of the person because this could cause hurt feelings.
People usually lose their permanent teeth due to periodontal disease(牙周炎),or gum disease,which is caused by bacteria that attacks the gums.Diseased gums aren't strong and healthy,so teeth can get loose and fall out.Older people often have many cavities(洞)that have been filled over the years,and these fillings can weaken over time,leading to more tooth problems.

51.If one of your baby teeth falls out,youC.
A.should have a false tooth fixed in its place
B.have to put it under your pillow at once
C.will gain a permanent tooth in future
D.can exchange it for some money
52.A person wearing denturesC.
A.should brush them with a special denture brush every few days
B.will take a very long time to adjust himself or herself to them
C.will experience unpleasant feelings at the beginning of fixing them
D.should use denture solution to soak them in his or her mouth
53.Which of the following is NOT true according to the passage?A
A.Partial dentures can prevent the remaining teeth from changing position.
B.Old people will find it hard to smile,talk,and eat properly without teeth.
C.A person's teeth will possibly get loose if diseases strike his gums.
D.It is hard for a person to wear dentures if all his teeth have fallen out.
54.What does the underlined word"weird"mean in the fifth paragraph?C
A.inconvenient       
B.excited          
C.uncomfortable       
D.impolite
55.In what kind of magazine will you most probably read this article?B
A.A cartoon magazine.
B.A medical magazine.
C.An educational magazine.
D.A sports magazine.

分析 本文介紹了當(dāng)人的那永恒的牙齒松動的話,就要考慮安假牙了,尤其對老年人來說.其次介紹了假牙的用處,重要性等等.

解答 51.C細(xì)節(jié)理解題.從文中第一段You can put it under your pillow and look forward to finding some money there in the morning.And then you can watch your new permanent(永恒的) tooth grow in its place.你可以把掉的牙放在枕頭下面然后盼望在早上找到一些錢.然后你就可以看到新的永恒的牙會從掉的地方長出來.可知選C.
52.C細(xì)節(jié)理解題.通過原句should be brushed daily with a special denture brush每日清洗,故A不正確.選項B,從文中第四段Dentures can cause pains at first and take little time to get adjusted to.需花費很少的時間來適應(yīng)假牙,故B不正確.選項D,從中第四段soaked(浸泡) in denture solution when not in the mouth.,故D不正確.故選C.
53.A細(xì)節(jié)理解題.文中第二段原句There are partial dentures,which take the place of only a few teeth and prevent the others from changing position.可知部分假牙可以防止其他牙改變位置,故A正確.從文中第五段Dentures are important for the old because,without teeth,it's hard to smile,talk,and eat properly.假牙對于老人很重要,因為他們沒有牙齒,發(fā)現(xiàn)很難適當(dāng)?shù)匚⑿Γv話和吃飯,故B正確.C項,從文中第六段People usually losetheir permanent teeth due to periodontal disease(牙周炎),or gum disease,人們通常會由于牙周炎或者齒齦病而失去永恒的牙齒,故C正確. D項,If all the teeth are gone,the person would need completedentures,從文中第三段If all the teeth are gone,the person would need complete dentures,如果所有的牙都掉完了,那么需要安全部假牙了,故D項表述不當(dāng),故選A.
54.C細(xì)節(jié)理解題.結(jié)合劃線部分的原句But it can be a little weird if you see someone take out his or her dentures.It can also be strange to see someone可以知道,如果你看到有人取出他的假牙,你會覺得很怪異、很不舒服.故選C.
55.B總結(jié)推理題.全文都在介紹有關(guān)牙齒和假牙的事情,不會出現(xiàn)在卡通雜志上,排除A;也不會在教育雜志上,排除C;更不會出現(xiàn)在體育雜志上,排除D.故選B.

點評 閱讀理解題,需要先讀題,理解清楚題目意思,接著帶著問題去文章中尋找、推斷答案.把握好細(xì)節(jié),注意推敲才能保證正確率.

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