Wisdom teeth are normally the last teeth to appear.This usually happens when people are in their late teen years or early twenties,in other words,when they are older and wiser. Wisdom teeth can grow into place normally and never cause a problem.But often there is not enough room for them in the mouth;they might crowd other teeth.Sometimes they even push sideways through the gums . An impacted wisdom tooth is one that fails to completely rise through the gums.Wisdom teeth that only partly break through can leave space for bacteria to enter around the teeth.Infection is a risk in these cases. Wisdom teeth that are not well lined and become impacted are often removed.The American Dental Association says removal is generally advised when wisdom teeth only partly break through the gums.Removal is also advised if there is a chance that wisdom teeth ate poorly lined.The best time to remove is before the teeth cause any problems or pain.Young adults are the best candidates for wisdom teeth removal. But why do we have wisdom teeth if we often need to get them removed?One theory has to do with our diets.Scientists say the diet of ancient humans probably required more chewing teeth.Life was probably a little rougher on the teeth back then,too.So it was good to have extras. The main purpose of the passage is to _ . A) advise B) persuade C) comment D) introduce
D
(Question)
There was one shop in the town of Mufulira which was widely known for its racial discrimination. It was a drugstore .While Europeans were served at the counter ,a long line of Africans queued at the window and often not only were kept waiting but were treated rudely by the shop assistants .One day I was determined to make a public protest against this kind of thing ,and many of the schoolboys in my class followed me to the store. I simply went into the shop and asked the manager politely for some medicine. As soon as he saw me standing in the place where only European customers were allowed to stand ,he shouted at me in a bastard language which is only used by a boss when speaking to his servants .I stood at the counter and politely requested in proper English that I should be served .The manager became angry and said , "Even if you stand till Christmas ,I will never serve you ." I went to the District Commissioner's office .Fortunately ,he was out ,for _ however ,I saw a young District Officer who was a friend of mine .He was very concerned to hear my story and told me that all I had to do was come to him personally and he would buy my medicine for me .I protested that that was not good enough .I asked him to accompany me back to the store and to make a protest to the manager .This he did ,and I well remember him saying to the manager , "Here is Mr. Kaunda who is a responsible member of the Urban Advisory Council, and you treat him like a common servant ." The manager of the drugstore apologized and said , "If only he had introduced himself and explained who he was ,then ,of course ,I should have given him proper service." I had to explain once again that he had missed my point .Why should I have to introduce myself every time I went into a store...any more than I should have to buy my medicine by going to a European friend ? I want to prove that any man of any color ,whatever his position ,should have the right to go into any shop and buy what he wanted .After all, the money which I paid across the... The manager of the drugstore shouted at the writer in dirty words because _ . A) he could not speak English in a polite way B) he thought the writer couldn't understand English C) that was the language he used when speaking to Africans D) that was the only language he could speak when he was angry
(Answer)
C
Ques: A man once said how useless it was to put advertisements in the newspaper. "Last week, " he said, "my umbrella was stolen from a London church. As it was a present, I spent twice its worth in advertising, but didn't get it back. " "How did you write your advertisement? " asked one of the listeners, a merchant. "Here it is, " said the man, taking out of his pocket a slip cut from a newspaper. The other man took it and read, "Lost from the City Church last Sunday evening, a black silk umbrella. The gentleman who finds it will receive ten shillings on leaving it at No. 10 Broad Street. " "Now, " said the merchant, "I often advertise, and find that it pays me well. But the way in which an advertisement is expressed is of extreme importance. Let us try for your umbrella again, and if it fails, I'll buy you a new one. " The merchant then took a slip of paper out of his pocket and wrote: "If the man who was seen to take an umbrella from the City Church last Sunday evening doesn't wish to get into trouble, he will return the umbrella to No. 10 Broad Street. He is well known. " This appeared in the newspaper, and on the following morning, the man was astonished when he opened the front door. In the doorway lay at least twelve umbrellas of all sizes and colors, and his own was among them. Many of them had notes fastened to them saying that they had been taken by mistake, and begging the loser not to say anything about the matter. ". . . if it fails, I'll buy you a new one" suggested that the merchant _ . A) was quite sure of success B) wanted to buy him a new umbrella C) didn't know what to do D) was rich enough to buy one
Ans: A
Question: Most musicians agree that the best violins were first made in prefix = st1 /Italy. They were made inCremona,Italy, about 200 years ago. These violins sound better than any others. They even sound better than violins made today. Violin makers and scientists try to make instruments like the old Italian violins. But they aren't the same. Musicians still prefer the old ones. No one really knows why these old Italian violins are so special, but many people think they have an answer. Some people think it is the age of the violins. They say that today's violins will also sound wonderful someday. But there is a problem here. Not all old violins sound wonderful. Only those from Cremonaare special. So age cannot be the answer. There must be something different aboutCremonaor those Italian violin makers. Other people think the secret to those violins is the wood. The wood of the violin is very important. It must be from certain kinds of trees. It must not be too young or too old. Perhaps the violin makers of Cremons knew something special about wood for violins. But the kind of wood may not be so important. It may be more important to cut the wood in a special way. Wood for a violin must be cut very carefully. It has to be the right size and shape. The smallest difference will change the sound of the violin. Musicians sometimes think that this was the secret of the Italians. Maybe they understood more than we do about how to cut the wood. Size and shape may not be the answer either. Scientists measured these old violins very carefully. They can make new ones that are exactly the same size and shape. But the new violins still do not sound as good as the old one. Some scientists think the secret may be the varnish, which covers the wood of the violin and makes it look shiny. It also helps the sound of the instrument. No one knows what the Italian violin makers used in their varnish. So no one can make the same varnish today. There may never be other violins like the violins of Cremona. Their secret may be lost forever.... Violins made today _ . A) look the same as the old ones B) sound the same as the old ones C) are better than the old ones D) have the same varnish as the old ones
Answer:
A