I walked to Mrs. Windsor's house and waited outside. She was working with another student, and I was not supposed to bother them by ringing the bell. I stood against the wall and daydreamed what I'd rather be doing. I had been tutored enough to read, understand, and even write some musical compositions, but I just didn't have a gift for it. Mrs. Windsor had offered to give me the lessons for free, so I felt my duty to try.

    The door opened and Wendy Barton came out. I walked in, sat down on the piano bench and began to sort through my sheet music. Today Mrs. Windsor introduced her niece Pasha to teach me. With a smile, Pasha sat beside me on the piano bench, opened my sheet music to the beginning page and asked me to play. I arranged my fingers on the keys. Then I frowned(皱眉) and concentrated to make the notes on the page match the finger movements. I had to admit I was a rather mechanical (呆板的) pianist.

    After about a page or two, Pasha gently put her hand on top of mine as if to calm my fingers. There was a long pause. "What are you hearing in the music?" I looked at her rather strangely and admitted I didn't know what she meant. "Like a story. Here, let me try and you listen," Pasha advised.

    She closed her eyes and took a deep breath, letting her fingers dance lightly over the keys. Then, she began to play. "See, it begins here beside some kind of river. Hear the water flowing beside you?"

    Her fingers rose and fell gently on the keys. "Now the princess appears and she's picking flowers from the water's edge." A happy piece of music filled the air in time to Pasha's dancing fingers. "Oh, but she slips!" The music changed. "And our princess is being carried off by the fast-flowing stream. Quickly, the princess' horse sees her plight (困境) and races to the river's edge where he swims out to let her catch hold of him. Luckily, they make it to the bank." Pasha said.

    I played many pieces of music that afternoon, finding the stories in the music and learning that sometimes it takes a friend to pull you out of the river onto dry land again.

    Food safety is a problem in all places around the world and people in different areas of the world prepare foods in different ways. The WHO released (发布) five simple rules for preparing food in a safe way. They call these rules the “Five Keys to Safer Food”.

Key 1: Keep clean

    {#blank#}1{#/blank#}People should wash their hands often — before touching food and while they are preparing food. People should wash all surfaces and equipment used for preparing food.

Key 2: Separate raw (生的) and cooked

    Raw foods should not touch prepared foods.{#blank#}2{#/blank#}.

Key 3:{#blank#}3{#/blank#}

    People should cook eggs and meat especially carefully. These foods may carry more micro-organisms (微生物) than other foods. Food like soup must be boiled for at least a minute to make it be cooked completely. It is also important that people re-heat cooked food completely.

Key 4: Keep food at safe temperatures

    When people finish eating, they should keep the left food in a refrigerator below 5℃and shouldn't store it for too long. At room temperature, about 20℃, the amount of micro-organisms can increase very quickly. But temperatures above 60℃ or below 5℃ control the growth of micro-organisms.{#blank#}4{#/blank#}.

Key 5: Use safe water and raw materials

    {#blank#}5{#/blank#}. Damaged or old food may develop harmful chemicals as it gets older.

A. Cook completely

B. This key tells about the importance of washing

C. Eat healthily

D. They can live where we make food

E. People should use safe water and choose fresh foods

F. They cannot grow as quickly in a very hot or very cold environment

G. People should use separate equipment and tools for touching and preparing raw foods

    Scientists say a huge percentage of bird species are in danger because their habitats, or homelands, are disappearing.

    Traditional migration (迁徙) paths take birds through countries that are not protecting the places for birds to stop, rest and feed. The scientists studied the migration or flight paths of almost 1,500 species. They decided that 91 percent of them passed through dangerous areas.

    The major danger for migratory birds is development. Buildings and pavements have covered the places where birds stop and feed as they move from one part of the world to another. One of the scientists who worked on the study says "Many of these important places have been lost to land reclamation because of urban, industrial and agricultural land expansion".

    The problem, according to scientists, is that many of these small birds die along their migration paths because they don't have a safe place to feed and rest. There is no place to restore (恢复) their energy for the next part of their journey. Countries in North Africa, Central Asia and those along the coasts of East Asia are having the most difficult time in protecting land. The scientists say these countries do not have enough areas that are safe for birds. One species that doesn't exist now is the Eskimo curlew. "Our world gets poorer every time we lose a species," one of the scientists says.

    The researchers say countries need to work together and come up with safe stopping areas for birds that pass through their boundaries. For example, one country might have preserved safe zones for migrating birds. But a neighbor country might not. A bird might die.

    One scientist who is not connected with the report tells Los Angeles Times that while some habitats are changing, more work can be done to make urban areas safe for birds.

    He says small changes, like planting more native plants or keeping cats out of the areas birds would be likely to use, could make a big difference.

Recess (课间休息) time has been dropping for many children in America. This drop began the same year the No Child Left Behind Act (NCLB) was passed. The law aimed to make American education system more internationally competitive by introducing achievement goals for schools. And the goals are gauged (评定) by standardized tests in reading and math. If schools missed their achievement goals, they could be in trouble, including loss of funding.

It's no surprise that teachers have felt the pressure to make sure students perform well on standardized tests. When educators are facing pay cuts, loss of funding to their school and perhaps even the loss of their jobs, it's no wonder that they started questioning if recess was a waste of time. This pressure to bring even more learning into the school day is especially felt by underperforming, low-income schools that are already short of funding.

It may seem strange to send kids out to play when they're falling below state standards, but getting outside for unstructured (散乱的) play may be more helpful than keeping kids in the classroom all day.

"Moving, running and playing outdoors freely have great influence on children. These activities play a role in children's abilities to focus and control themselves throughout the day," Marie Conti says, a famous educator of early childhood education. The mind cannot be educated without using the body. Learning is a whole of thinking and moving," she added.

Recess time makes it possible for children to learn something they can't get in class. Asking other kids to play, explaining the rules of a complex game and ending arguments are all important life lessons that children can only learn if they're given time to play. When something unhappy happens, children can find a way to get back to having fun themselves.

The physical activities kids take part in during recess can also reduce stress levels and allow children to feel more relaxed. In an education system that. Continues to place higher expectations on children to perform to a certain standard, less stress is just what the doctor ordered.

Street art is a very popular form of art that is spreading quickly all over the world. You can find it on buildings, sidewalks, street signs and trash cans from Tokyo to Paris, from Moscow to Cape Town. Street art has become a global culture and even art museums and galleries are collecting the works of street artists. 

Street art started out very secretly because it was illegal to paint on public and private property without permission. People often have different opinions about street art. Some think it is a crime and others think it is a very beautiful new form of culture. 

Art experts claim that the street art movement began in New York in the 1960s. Young adults painted words and other images on walls and trains. This colourful style of writing became known as graffiti. Graffiti art showed that young people wanted to rebel against society. They travelled around cities to create paintings that everyone could see. In many cases, they had trouble with the police and the local government. 

Street artists do their work for different reasons. Some of them do not like artists who make so much money in galleries and museums. They choose street art because it is closer to the people. Some artists try to express their political opinions in their work. They often want to protest against big firms and corporations. Others like to do things that are forbidden and hope they don't get caught. Advertising companies also use street art in their ads because it gives people the impression of youth and energy. 

Today, the Internet has a big influence on street art. Artists can show their pictures to audience all over the world. Many city residents, however, say that seeing a picture on the Internet is never as good as seeing it alive. The street art movement lives with the energy and life of a big city. There, it will continue to change and grow. 

If you've ever seen a sparrow steal your dog food or a crow open a garbage bag, you get a sense of that some birds have learned to take advantage of new feeding opportunities—a clear sign of their intelligence. Scientists have long wondered why certain species of birds are more innovative than others, and whether these capacities stem from larger brains or from a greater number of neurons（神经元） in specific areas of the brain.

It turns out that it's a bit of both, according to a recent study by an international team that included members from McGill University published in Nature Ecology and Evolution.

The researchers used a new technique to estimate the number of neurons in a specific part of the brain called the pallium in 111 bird species. The pallium in birds is equal to the human cerebral cortex（大脑皮层）, which is involved in memory, learning, reasoning, and problem-solving, among other things. When these estimates about neuron numbers in the pallium were combined with information about over 4,000 feeding innovations, the team found that the species with the higher numbers of neurons in the pallium were also likely to be the most innovative.

"The amount of time chicks spend in the nest as their brains develop might also play acrucial role in the evolution of intelligence," says McGill University Emeritus Professor Louis Lefebvre who spent more than 20 years gathering examples of feeding innovations. "Larger species of crows and parrots, which are known for their intelligence, spend longer in the nest, which allows more time for the brain to grow and accumulate pallial neurons."

The results of the study help to deal with previously opposed views of the evolution and significance of brain size and show how a life-history perspective helps to understand the evolution of cognition.