Read the following article and select the best answer. Article: For all dinner tables, a glass of milk seems to be a must. At least it was when I was growing up. It is widely believed that milk is a must in building strong bones and teeth. There's no doubt that dairy products, especially milk, are high in protein and calcium, and Vitamin D and Vitamin A are added to most milk products. While it's well known that our bones need calcium, some studies suggest that high calcium intake doesn't necessarily lower a person's risk for fractures . A Harvard study found that people who drank two or more glasses of milk had no greater protection from breaking a bone than those who drank a glass or less a week. There is no doubt that we need calcium. Some anti-dairy supporters claim dairy products can lead to heart disease. Much of this claim is based on high-fat dairy products, like cheese and cream, which may indeed lead to some health problems. Some studies have linked high milk intakes with a risk of prostate cancer; this seems also to be caused by high-fat dairy products, but not by dairy products in general. Although milk has always been regarded as the most important thing we need for our bones, one of the most important things in strengthening bones and reducing the risk of osteoporosis is weight-bearing exercise, such as jogging, walking, and weight lifting. Perhaps we should think of dairy products as less like a nutrient and more like a food. If you like it, eat it. If not, find something else to eat. Some claims may not be completely true. When I eat cream, I'm not thinking about calcium, protein, or any such thing. I'm thinking it is delicious. Question: What is the best title for this passage? - Milk: is it really necessary for children? - The disadvantages of drinking milk. - Milk causes health problems. - Milk: is it really good for the body?
Milk: is it really good for the body?

(Question)
Read the following article and select the best answer. Article: What do you do if you are hit in the mouth and one of your teeth is knocked out? A dentist may be able to put the tooth back in for you, but you have to get to the dentist first.In the meantime, you have to store the tooth so that it will stay healthy. The simplest thing to do is put the tooth back into your mouth, or you could put it in milk.Frank Courts, a dentist at the University of Florida, worked with other researchers to find the safest way of keeping knocked-out teeth.He tried putting teeth into milk, into water, and into cell-culture medium .He also tried, just drying the teeth in the open air.He used teeth that had to be removed from people's mouths for various reasons.The teeth were put into one of the solutions or stored in the air for one hour.Then cells from the root of the teeth were scraped-off the teeth.Dr.Courts and the others then studied how healthy these cells were. The cell-culture medium worked best to keep a knocked-out tooth healthy outside the mouth.However, few people keep cell-culture medium handy at home or in school. The next best thing was milk.But Dr.Courts said that the best thing of all was to wash the tooth and put it right back into its socket in the mouth.For some people, though, this is just too painful or upsetting.So milk will do, until you get your tooth (and your mouth)to a dentist. Question: The best way to keep a knocked-out tooth healthy outside the mouth is to store it_. - in cell-culture medium - in milk - in water - in the open air
(Answer)
in cell-culture medium

Ques: Read the following article and select the best answer. Article: Accidents happen almost every day. Some accidents are not serious and some are. We read about such accidents nearly every day in the newspapers. It is wrong for people to think that accidents take place only on the roads or highways, or even at work places. Home accidents are just as common. Because very few home accidents are reported, people come to think that there are few accidents which happen in homes. There have been many cases where people fall to their deaths from high rise flats. Children often fall over while coming down the stairs. Old people may slip on wet floors if they are not careful. Nowadays there are a lot of modern electrical appliances such as rice cookers which make life easy for the modern house wives. These appliances can kill if they are not used in the proper way. Gas stoves used for cooking are also dangerous if they are not properly used. They may cause burns or, in more serious cases, even fires. But all such accidents can be stopped if we are careful and follow simple rules of safety. For example, it is unwise for people to try repairing their own electrical appliances if they do not know how to. It is safer to get them repaired by an electrician . Question: Accidents take place _ . - mostly in homes - mostly on roads and highways - mostly in factories - almost everywhere
Ans: almost everywhere

Question: Read the following article and select the best answer. Article: About 90 percent of Chinese believe the polarization between the rich and poor is "serious" in China, according to a survey conducted by China Youth Daily. And more than 80 percent of the respondents surveyed said something must be done to narrow the expanding gap between the rich and poor, while 14.1 percent said it was necessary. The polarization has aroused wide concern among the public in recent years. The State Development and Reform Commission said the _ had reached 0.47 for China, up from o.29 two decades ago. Usually, a country with a number above 0.4 is warned to pay attention to the income inequality problem. To find out the people's view, the survey covered 10,250 respondents, between the ages of 20 and 30 with a college education and a monthly salary between 1,000 and 3,000 yuan. Surprisingly, most disagreed with the view of experts who claim the urban-rural difference is causing the widening gap. More than 70 percent of the respondents believed that " the group of special interests" is the prime reason for the polarization, followed by "people in power" 68 percent, and "bosses" 50 percent. Another unexpected finding is that almost all agreed that a good educational background and knowledge were not the decisive factors in gaining wealth. About 95 percent said rich people are not necessarily those who are able to speak English or have a college education. Today in China, rich people , accounting for 10 percent of the population, control 45 percent of the total social fortune, and poor people, also 10 percent of the population, only control 1.5 percent, according to an investigation published by the National Bureau of Statistics last June. Question: Experts hold the view that the main reason for the polarization is _ . - the urban-rural difference - the group of special interests - the people in power - the bosses
Answer:
the urban-rural difference