Drinking a lot of water does not do any good to the body, according to two experts in the United States. In fact, they warn, drinking too much water could be, in certain cases, harmful.

In a study, Dr Stanly Goldfarb and Dr Dan Negoianu, both of the Renal, Electrolyte and Hypertension Division at the University of Pensylvania, the United States, have denied the popular belief that drinking a lot of water clears body toxins（毒素）better, improves skin, and helps reduce weight.

Dr Goldfarb and Dr Negoianu say that they found little proof to back the public opinion that drinking 8 glasses of water every day benefits health. At the same time, they fond little proof of harm in drinking 8 glasses of water every day.

It is widely believed that in some cases-such as athletes, people who live in hot, dry environments, and those with certain medical conditions-drinking a lot of water indeed helps, but no studies have been done to prove the benefits of this practice in average, healthy people, the website medheadlines.com reports.

The study at the University of Pennsylvania also examined reports that some people experienced increased headaches when their consumption（消耗）of water was low. In one small study, which the doctors reviewed, the group drinking the most water reported fewer headaches than the control group, “but the difference in the number of headaches was o small between the two groups as to be considered unimportant.”

The researchers concluded that there is no scientific proof to support that average, healthy people need to drink at least 8 glasses of water each each day.

The website medheadines.com says that, according to an Indian doctor, drinking too much water is harmful. If water enters the body more quickly than it can be removed, problems can occur.

What’s the key message delivered in the passage?

       A．Drinking too much water might bring harm.

       B．Whether to drink enough water makes no difference.

C．Drinking too much water may cause headaches.

       D．Average, healthy people should drink more water.

We can learn from the passage that 8 glasses of water every day_______ .

       A．proves good for the body           B．has scientific proof of harm

       C．is sure to reduce headaches     D．is generally considered necessary

Who may agree that drinking lots of water helps to lose weight?

       A．The two experts.             B．The Indian doctor.

       C．The general public.      D．The website.

According to the passage, we know that_______.

       A．the website medheadlnes.com is developed by an Indian doctor

       B．the study was carried out by two experts with an Indian doctor

       C．the two experts performed the study at the University of Pennsylvania

       D．drinking 8 glasses of water every day can cure certain diseases

          that young babies learn to do things because certain acts lead to awards.

B
All of us eat every day, but most of us don’t understand nutrition. We often make mistakes in talking about good diet.
For example, many people think that foods such as rice, bread and potatoes will make one grow fat. In fact, these foods are very good to one’s health. They are good sources of many vitamins. And in comparison with steak and beef, they contain less amount of calories.
Some people don’t like canned(罐装的) or frozen vegetables, because they think fresh vegetables cooked at home are always better. This is again wrong. In fact, whether the vegetables are good or not depends more on how they are prepared. Overcooking, for example, destroys good qualities of vegetables. Vegetables cooked in too much water can use a large amount of vitamins.
It is widely believed extra vitamins provide more energy. But taking more than the body needs doesn’t make it function better.
It is also wrong to say that vegetables grown in poor, worn-out soil are lower in vitamins than vegetables grown in rich soil. The vitamins in our foods are in the plants themselves. They don’t come from the soil. However, the minerals(矿物质) in a plant depend on the minerals in the soil.
In short, there are many false ideas about nutrition. We need to correct them.
1. This passage is mainly about_______.
A. nutrition           B. vitamins            C. vegetables         D. health
2. Rice, bread and potatoes do good to people’s health mainly because_______.
A. they make people fat                      B. there are lot of vitamins in them
C. they contain less amount of calories compared with steak and beef.
D. both B and C.
3. Why don’t some people like canned or frozen vegetables? Because______.
A. they think fresh vegetables contain less vitamins
B. they think fresh vegetables contain more vitamins than the canned or frozen ones
C. they don’t think the canned or frozen vegetables are fresh
D. they don’t think the canned or frozen vegetables taste as good as the fresh ones
4. Which of the following is true according to the passage?
A. Many people know almost everything about nutrition.
B. Food such as rice, bread and potatoes make people fat.
C. vegetables grown in poor worn-out soil may have the same amount of vitamins as vegetables grown in rich soil.
D. extra vitamins provide less energy.
5. The point of the passage is that______.
A. the minerals in a plant depend on the minerals in the soil
B. people make mistakes when talking about good diet
C. taking more vitamins than the body needs doesn’t make it function better
D. vegetables cooked in too much water can lose a large amount of vitamins

It is widely accepted that young babies learn to  do things because certain acts lead to________.

 A. rewards   B. prizes    C. awards   D. results

  A vegetarian（素食者）diet may help to protect people against cancer, a UK study suggests. Analysis of data from 52,700 man and women shows that those who did not eat meat had significantly fewer cancers than those who did.
Published in American Journal of Clinical Nutrition, the findings were worth looking into .Although it is widely recommended that people eat some fruits and vegetables every day to reduce their risk of cancer and other diseases, there is very little evidence showing that a vegetarian diet can surely reduce cancers .
But surprisingly, the researchers also found a higher rate of colorectal（直肠的）cancer – a disease connected with eating red meat – among the vegetarians.
Study leader Professor Tim Key, a researcher at the University of Oxford, said no previous study had looked at the diet in this way and that there had been a lot of confusion about the issue.
“It’s interesting – it suggests there might be some reduction in cancers in vegetarians, but we need to look carefully at that”, said the professor.
More work is needed to show the connections between diet and cancer but such studies are very hard to do. Dr Joanne Lunn, a senior nutrition scientist at the British Nutrition Foundation, said the findings highlighted the fact that cancer is a complex disease and many different lifestyle factors play a part in determining a person’s risk.
73. What would be the best title for the passage?
A. Reasons for getting cancers.
B. Vegetarians get fewer cancers.
C. Tips on avoiding cancers.
D. A surprising discovery on colorectal cancer.
74. Why are the findings worth looking into?
A. They can encourage healthy eating.
B. They show that cancer is a complex disease.
C. they show a brand new discovery.
D. They have been published in American Journal of Clinical Nutrition.
75. We can learn from the passage that _________.
A. people eating red meat are unlikely to get colorectal cancer
B. the diet is one of the many factors that determine a person’s health
C. the connections between a vegetarian diet and cancer are clear through the research
D. scientists will soon figure out the relationship between the diet and cancer