3 . The benefits of regular exercise are well documented but there’s a new bonus to add to the ever-growing list. New researchers found that middle-aged women who were physically fit could be nearly 90 percent less likely to develop dementia in later life, and as they did, it came on a decade later than less sporty women.

Lead researcher Dr. Helena Horder, of the University of Gothenburg in Sweden, said : "These findings are exciting because it’s possible that improving people's cardiovascular （心血管的）fitness in middle age could delay or even prevent them from developing dementia. "

For the study, 191 women with an average age of 50 took a bicycle exercise test until they were exhausted to measure their peak （最大值的） cardiovascular capacity. The average peak workload was measured at 103 watts.

A total of 40 women met the criteria for a high fitness level, or 120 watts or higher. A total of 92 women were in the medium fitness category; and 59 women were in the low fitness category, defined as a peak workload of 80 watts or less, or having their exercise tests stopped because of high blood pressure, chest pain or other cardiovascular problems.

These women were then tested for dementia six times over the following four decades. During that time, 44 of the women developed dementia. Five percent of the highly fit women developed dementia, compared to 25 percent of the women with medium fitness and 32 percent of the women with low fitness.

"However, this study does not show cause and effect between cardiovascular fitness and dementia, it only shows an association. More research is needed to see if improved fitness could have a positive effect on the risk of dementia and also to look at when during a lifetime a high fitness level is most important. " She also admitted that a relatively small number of women were studied, all of whom were form Sweden, so the results might not be applicable to other groups.

1. What is on the ever-growing list mentioned in the first paragraph?

A．Positive effects of doing exercises.

B．Exercises suitable for the middle-aged.

C．Experimental studies on diseases.

D．Advantages of sporty woman over man

2. Why did the researchers ask the women to do bicycle exercise?

A．To predict their maximum heart rate.

B．To assess their cardiovascular capacity

C．To change their habits of working out

D．To detect their potential health problems

3. What do we know about Dr Horder's study?

A．It aimed to find a cure for dementia.

B．Data collection was a lengthy process.

C．Some participants withdrew from it.

D．The results were far from satisfactory.

4. Which of the following is the best title for the text?

A．More Women Are Exercising to Prevent Dementia

B．Middle-Aged Women Need to Do More Exercise

C．Fit Women Are Less Likely to Develop Dementia

D．Biking Improves Women's Cardiovascular Fitness

6 . 阅读下面短文, 在空白处填入1个适当的单词或括号内单词的正确形式。

The shelves in most supermarkets are full of family-size this and multi-buy that. However, if you’re shopping for one, buying extra     1     (benefit) from price reductions doesn’t make sense. Either your shopping is then too heavy to carry home     2     you can’t use what you’ve bought while it’s still fresh.

Of course, shops are not charities — they price goods in the way     3     will make them the most money. If most of their customers are happy to buy larger quantities, that’s     4     they’ll promote. But that leaves the solo (单独) customers out of pocket and disappointed.

Many supermarkets are no longer doing “buy one get one free” promotions because of the     5     (criticize) that they lead to waste. Consumers prefer money off individual items. However, though it’s nice to get a few cents off a pack of sausages, it would help even more if they could sometimes     6     (offer) in smaller packs. Even the biggest sausage fan doesn’t want to eat them every day.

If your supermarket sells loose produce, then buying smaller quantities is easier. Over the last two years, some supermarkets     7     (start) selling chicken or salad in packs     8     (design) with two halves containing separate portions (份). Then, when you use one section,     9     other stays fresh.

Who knows, perhaps some of the more forward-looking     10     (one) may yet come out with a whole range of “just for you” pack sizes with special offers as well.

8 . If the only reading you ever do is the novel or magazine, the speed at which you read -probably does not matter very much. But if you have to read a great deal for study, you will appreciate the benefits of being able to read more quickly.     1    

·Before you open the book, make sure that you are comfortable. You need a seat which supports your back and the book should be at the right distance from your eyes.     2    

    3     Look at the table of contents, the preface, the chapter heading,etc.This will help you to decide whether you really need to read the whole book or only certain parts of it. Ten minutes spent in this way could save you quite a lot of time in the long run.

If you decide that you need to read the whole book, decide how much you can read at a time.     4     A history book which may contain the facts in story form will be easier to read than one dealing with scientific subjects. In the former case you may be able to read a chapter. In the latter you may only be able to read one page.

Always keep a pencil and paper beside you.     5    Note also the facts important for your purpose as well as anything which leads you to further research. You don't have to write these things in detail. It is enough to put the page number and one or two words as a reminder .

A．Stop to have a rest now and then.

B．Spend a few minutes looking through the book.

C．This depends on the type of book you are reading.

D．Here are some tips to help improve your reading speed.

E．Make a note of any page which is of special importance.

F．You may find yourself having to learn something by heart.

G．Keep the room cool rather than warm to avoid feeling sleepy.

9 . An Australian professor is developing a robot to monitor the health of grazing cattle, a development that could bring big changes to a profession that's relied largely on a low-tech approach for decades but is facing a labor shortage.

Salah Sukkarieh, a professor at the University of Sydney, sees robots as necessary given how cattlemen are aging. He is building a four-wheeled robot that will run on solar and electric power. It will use cameras and sensors to monitor the animals. A computer system will analyze the video to determine whether a cow is sick. Radio tags (标签) on the animals will measure temperature changes. The quality of grassland will be tracked by monitoring the shape, color and texture (质地) of grass. That way, cattlemen will know whether they need to move their cattle to another field for nutrition purposes.

Machines have largely taken over planting, watering and harvesting crops such as com and wheat, but the monitoring of cattle has gone through fewer changes.

For Texas cattleman Pete Bonds, it's increasingly difficult to find workers interested in watching cattle. But Bonds doesn't believe a robot is right for the job. Years of experience in the industry - and failed attempts to use technology - have convinced him that the best way to check cattle is with a man on a horse. Bonds, who bought his first cattle almost 50 years ago, still has each of his cowboys inspect 300 or 400 cattle daily and look for signs that an animal is getting sick.

Other cattlemen see more promise in robots. Michael Kelsey Paris, vice president of the Oklahoma Cattlemen's Association, said a robot could be extremely useful given rising concerns about cattle theft. Cattle tend to be kept in remote places and their value has risen, making them appealing targets.

1. What is a problem with the cattle-raising industry?

A．Soil pollution.	B．Lack of workers.
C．Aging machines.	D．Low profitability.

2. What will Sukkarieh's robot be able to do?

A．Monitor the quality of grass.	B．Cure the diseased cattle.
C．Move cattle to another field.	D．Predict weather changes.

3. Why does Pete Bonds still hire cowboys to watch cattle?

A．He wants to help them earn a living.	B．He thinks men can do the job better.
C．He is inexperienced in using robots.	D．He enjoys the traditional way of life.

4. How may robots help with cattle watching according to Michael Kelsey?

A．Increase the value of cattle.	B．Bring down the cost of labor.
C．Make the job more appealing.	D．Keep cattle from being stolen.