Below is some advice on how to prevent cancer:

    Eat blueberries

    Aside from being a healthy and delicious snack, the blueberries contains pterostilbene, which has important colon(结肠) cancer-fighting. {#blank#}1{#/blank#}. Blueberries also offer a large dose of vitamins C. So at breakfast, try to take in a cup and a half of blueberries in your cereal or yogurt, or mixed with other berries.

    Relax

    {#blank#}2{#/blank#}? Find ways to relax and you may reduce your chances of developing cancer. Purdue University researchers tracked 1,600 men over 12 years and found that half of those with high levels of worry died during the study period. Only 20 percent of the optimists died before the study were completed, while 34 percent of the extremely anxious men died of some type of cancer.{#blank#}3{#/blank#}!

    Break a Sweat

    {#blank#}4{#/blank#}. In a study of 29,110 men published in The International Journal of Cancer, men who exercised just once a week had a percent lower risk of prostate cancer than men who didn't work out at all. The better the frequency and intensity of the exercise, the bigger the reduction in risk, according to the study.

    {#blank#}5{#/blank#}

    There's no question that secondhand smoke kills, A recent American Journal of Public Health study showed that nonsmokers working in smoky places had three times the amount of carcinogen（致癌物）in their body than nonsmokers working in smoke-free locations. What's worse, their levels of the carcinogen rose 6 percent for every working hour. Many states have banned smoking in all workplaces, bars and restaurants. The message is clear: Do whatever you can to avoid the cloud of smoke.

    Not all people like to work but everyone likes to play. All over the world men and women and boys and girls enjoy sports.

    {#blank#}1{#/blank#} They help to keep people healthy and feeling good. When they are playing games, people move a lot. This is good for their health. Having fun with their friends makes them happy.

    {#blank#}2{#/blank#} In small towns, crowds meet to watch the bicycle races or the soccer games. In the big cities, thousands of people buy tickets to see an ice-skating show or a baseball game.

    {#blank#}3{#/blank#}What are your favorite sports now? You probably play the games that people in your town or city play. {#blank#}4{#/blank#} Then swimming is probably one of your sports. Boys and girls in Australia love to swim. There are wonderful beaches there and the weather is good for swimming. {#blank#}5{#/blank#} Then you would like to ski. There are many skiers in Austria where there are big mountains and cold winters. Does it rain often where you live? Then kite flying would not be one of your sports. It is one of the favorite sports of Thailand.

A. How many sports do you like?

B. What's the weather like?

C. Is the climate hot where you live?

D. Or do you live in a cold climate?

E. Many people enjoy sports by watching others play.

F. What games have you played?

G. Sports help people to live happily.

    Reducing class size has traditionally been seen as an important way to improve a student's educational experience. Many often believe that smaller classes would permit teachers to give more personal attention to their students.{#blank#}1{#/blank#}.

    But one recent study suggests there's not much research-based evidence to support this idea. The research was collected by a team from Denmark's Danish Center for Social Science Research.

The study notes that one of the main problems with reducing class size is that it can have very high costs. {#blank#}2{#/blank#}. Financial limitations make it very difficult for many schools to reduce the number of students in the classroom.

    The new study began by examining 127 studies on classroom size. Its goal was to examine the major research studies already completed on the subject. {#blank#}3{#/blank#}. In the end, the research centered on 10 main studies with possible sampling (采样)problems.

    The researchers concluded that there's some evidence to suggest that reducing class size may lead to some improvement in a student's reading achievement. {#blank#}4{#/blank#}. They found just a 53-percent chance that a randomly selected test score from a student from a small class would be higher than the selected score of a student from a larger class. {#blank#}5{#/blank#}. This led the researchers to conclude that there would be no benefit at all to math students in a smaller class size.

A. But they said the effect is very small

B. For mathematics achievement, the result was 49 percent

C. This can theoretically lead to improved academic results for students

D. Many public opinion studies have shown teachers favor smaller class sizes

E. The effects of larger class size can stay long after the students complete their education

F. Increasing class size is one of the most common ways school systems control education spending

G. They especially centered on those trying to measure if smaller class size led to greater academic success

Tips for cooking on a tight schedule

    From my experience, there are three main reasons why people don't cook more often: ability money and time.{#blank#}1{#/blank#} Money is a topic I'll save for another day. So today I want to give you some wisdom about how to make the most of the time you spend in the kitchen. Here are three tips for great cooking on a tight schedule:

    ⒈Think ahead. The moments when I think cooking is a pain are when I'm already hungry and here is nothing ready to eat. So think ahead of the coming week. When will you have time to cook? Do

you have the right material(材料) ready?{#blank#}2{#/blank#}

    ⒉Make your time worth it. When you do find time to cook a meal, make the most of it and save yourself time later on. Are you making one loaf of bread? {#blank#}3{#/blank#}It takes around the same amount of time to make more of something. So save yourself the effort for a future meal.

    ⒊{#blank#}4{#/blank#} This may surprise you, but one of the best tools for making cooking worth your time is experimentation(实验). It gives you the chance to come up with new ideas and recipes(食谱) that can work well with your appetite and schedule. The more you learn and the more you try, the more ability you have to take control of your food and your schedule.

    Hopefully that gives you a good start. {#blank#}5{#/blank#}And don't let a busy schedule discourage you from making some great changes in the way you eat and live!

A. Try new things.

B. Make three or four instead.

C. Ability is easily improved.

D. Understand your food better.

E. Cooking is a burden for many people.

F. A little time planning ahead can save a lot of work later on.

G. Let cooking and living simply be a joy rather than a burden.

    As is often the case, when we wake up feeling sleepy and with dark circles under eyes, many of us often make a decision: "I'm going to bed earlier tomorrow!" we are so determined. {#blank#}1{#/blank#} We are still absorbed in what we are doing without realizing it is already too late the next day. This behavior is called "bedtime procrastination" (睡眠拖延症), and results from lack of self-control and our body clock.

    {#blank#}2{#/blank#} According to a study carried out by a group of health psychologists, 53 percent of the 2,400 participants said they didn't follow their sleep schedule, delaying it at least twice a week. They delayed bedtime because they couldn't stop doing other trivial things (琐事), which were keeping them up in the first place.

    People who generally have trouble resisting temptations (诱惑) and following their intentions firmly are also more likely to delay going to bed. They find it hard to control themselves. {#blank#}3{#/blank#} Our body clock also plays an important role when it comes to bedtime. Those who get up late are more likely to postpone their bedtime than those who wake early every morning. Night owls would go to bed late at the very beginning of the weekday, even though they had to get up early for work and school. {#blank#}4{#/blank#} 

    Therefore, if we want to cure our bedtime procrastination, the intention to go to bed earlier is not enough. {#blank#}5{#/blank#} We should have a clear understanding that bedtime procrastination is a big problem. The choices we make could turn out to be pretty important for our health.

A. Bedtime procrastination is a common problem.

B. It will have extreme effect on our health sooner or later.

C. Yet, lack of self-control is not the only thing to blame.

D. Unfortunately, chances are that we don't stick to our promise.

E. It's their special body clock that plays a part in delaying their bedtime.

F. Biological processes need to support this intention.

G. So we just need to take action to change our sleep model.

Do we have a movement signature?

As humans, we have several qualities that separate us from one another, such as our fingerprints. {#blank#}1{#/blank#}

According to a recent study, each person has a unique movement signature (鲜明特征). Depending on the person, these differences can be subtle or pronounced.

{#blank#}2{#/blank#} For the study, scientists attached electrodes (电极) to muscles in the legs of volunteers. The volunteer were then asked to perform activities such as walking on walking machines and riding stationary bikes (健身车), which were adjusted according to each person's physical appearance in order to make sure everyone was judged using the same standards.

Scientists fed the information to a computer along with the volunteer's name. {#blank#}3{#/blank#}Next, the computer was fed information without the user's name and it could identity the person correctly 99% of the time. The outcomes of the study showed that each of us does have something unique about our general movements.

{#blank#}4{#/blank#} Since this is just a pilot study, scientists will do more tests to see if the signature changes with age and weight changes. But with a deeper understanding of the science of movement, doctors could possibly develop more intricate prosthetics (复杂精细的假肢). {#blank#}5{#/blank#}Whether that's cool or frightening is up to you to decide.

A. How could this study be of use to scientists?

B. What do you think of the findings of the study?

C. Volunteers are expected to write a report on the activities.

D. Is it possible that we also have unique qualities in our movement.

E. Scientists could also program robots to copy humans' movements more exactly.

F. In this way, the computer could learn the unique movement quality of each person.

G. The study was conducted by inviting people to take part in a couple of physical activities.