单选题
单选题 According to Mr. Tait, what should we do to improve the situation of tooth decay?
A.Spend more money in fighting tooth decay.
B.Have better education.
C.Improve people's standard of living.
D.Get rid of some of our teeth.
【正确答案】 D
【答案解析】[听力原文]
Millions of dollars are spent every year in fighting tooth decay. Despite better education and a higher standard of living, the number of people needing dental treatment increases every year. A British dentist, Mr. R. V. Tait, has thought about why this is the case, and has made some suggestions about what could be done to improve the situation.
He has pointed out that our thirty-two teeth evolved in the past to deal with a much tougher diet than we have now. Our ancestors ate tough gritty food, and so they needed many teeth. Our teeth, however, do not have to cope with such a diet, because we eat much softer food. Unless, therefore, we are prepared to eat the diet of our ancestors, we should get rid of some of our teeth. Instead of thirty-two teeth, it would be better if we had a well-spaced set of twenty to twenty-four. This would force the rest to work harder and make them more healthy.
Another advantage would be that with larger spaces between our teeth, cavities could not develop, as they do now, between teeth that are very close together. Furthermore, most extractions would be done during childhood when teeth can be extracted easily, and sockets heal with little pain.
Mr. Tait's theory is original and convincing. It is a remarkable piece of work, because most dentists believe we should keep as many of our teeth as possible. It is unlikely, unfortunately, that they will be persuaded by his ideas.

[解析] 原文中有“Unless,therefore,we are prepared to eat the diet of our ancestors,we should get rid of some of our teeth”直接给出了其观点。与选项D一致。
单选题 Why don't we need as many teeth as our ancestors?
A.Because we have to deal with much food
B.Because we eat much softer food.
C.Because we eat tough gritty food.
D.Because our ancestors ate much softer food.
【正确答案】 B
【答案解析】[解析] 本题答案可直接从原文“Our ancestors ate tough gritty food.and so they needed many teeth.Our teeth,however,do not have to cope with such a diet,because we eat much softer food”中得出。
单选题 Which of the following is NOT an advantage of a well-spaced set of twenty to twenty four teeth?
A.These teeth would work harder and become healthier.
B.Decay of teeth could not develop.
C.We would eat the diet of our ancestors.
D.Teeth can be extracted easily during childhood.
【正确答案】 C
【答案解析】[解析] 本题A、B、D三个选项的内容都在原文中直接出现,并且C项的内容明显不符合题干要求。
单选题 What's the attitude of most dentists to Mr. Tait's ideas?
A.They agree with his ideas.
B.They have different opinions.
C.They will be persuaded by his ideas.
D.They believe we should keep more teeth than we have now.
【正确答案】 B
【答案解析】[解析] 本题的答案可以从短文最后几句话中得出:“…most dentists believe we should keep as many as our teeth as possible.It is unlikely,unfortunately,that they will be persuade by this idea.”