Have you ever noticed that some people are able to effortlessly remember even the most boring details, and quickly understand new things, and wished that you too could be like that? To unlock the full potential of your brain, you need to keep it active and acute. But how? Check out these tips: * Exercise & get your body moving  Exercising doesn't just exercise the body; it also helps to exercise your brain. Without regular exercise your blood vessels   begin to lose the ability to effectively pump blood and it also reduces the amount of oxygen and nutrients   that your blood carries to your brain. When the nutrients don't make it there, the brain's ability to function is compromised. To prevent this from happening, make sure you get moving every day. Walking, swimming and dancing are all excellent activities.  * Get rid of stressors and seek help for depression Among the most brain-damaging stressors is severe depression, which is actually often mistaken for a memory problem since one of its primary symptoms is the inability to concentrate. If you can't concentrate, you might feel like you are constantly forgetting things. Depression increases the levels of cortisol   in your brain, which affects your memory. Seek professional help to get rid of your depression -- your brain will thank you. * Feed your brain  50 to 60 percent of the brain's overall weight is pure fat, which is used to insulate   its billions of nerve cells. The better insulated a cell is, the quicker you will be thinking. This is exactly why parents are advised to feed their young children whole milk. Thus, eating foods that contain a healthy mix of fats is vital for long-term memory. Some excellent food choices include fish and dark leafy green vegetables. Why should parents feed their babies whole milk? A) Because less than half of the brain's overall weight is pure fat. B) Because whole milk is very easy for babies to digest. C) Because no other food is more suitable for babies than milk. D) Because babies' brains need fat to grow and work properly.
D

While others look away from trouble, this lady digs in and gets to work. Gretchen Buchenholz, the native New Yorker and mother of six, has worked on behalf of needy and margin1alized families for years in the city. She does everything from buy groceries for homeless families to start schools for children. In 1974 she founded Merricat's Castle, a nursery school that opened its doors to kids of all racial and economic backgrounds, the able-bodied as well as those with disabilities or terminal illnesses. She founded the Association to Benefit Children (ABC), the nonprofit group, some 20 years ago. The story of how she started ABC is pretty amazing. In 1984 she was on her way to a government office to get a day-care permit when, by accident, she entered a room where homeless families were waiting to be placed in a " welfare hotel." She saw three bare cribs   with babies lying in them. The children wore no diapers (their parents couldn't afford them), and the room was filthy  . After talking to the parents and learning that they and their children were hungry, Gretchen marched out and bought bread, peanut butter, apple juice and diapers. Then she started making phone calls. She dialed the American Red Cross, City Hall and The New York Times. Gretchen has made many people see that we need to recognize these children are not different from our own, and we need to join in and help. Too often, people look away from suffering. But she sets us an example that we should gain strength to do something about it. The children wore no diapers because  _  . A) they had no parents B) their parents were waiting for the government's help C) their parents had no money to buy diapers D) Gretchen Buchenholz would buy diapers for them
C

The Marches were a happy family. Poverty, hard work, and even the fact that Father March was away with the Union armies could not down the spirits of Meg, Jo, Amy, and Marmee, as the March girls called their mother. The March sisters tried to be good but had their share of faults. Pretty Meg was often displeased with the schoolchildren she taught; boyish Jo was easy to become angry; golden-haired schoolgirl Amy liked to show up; but Beth, who kept the house, was loving and gentle always. The happy days passed and darkness came when a telegram arrived for Mrs. March. "Your husband is very ill," it said, "come at once." The girl tried to be brave when their mother left for the front. They waited and prayed. Little Beth got scarlet fever   when she was taking care of the sick neighbor. She became very ill but began to recover by the time Marmee was back. When Father came home from the front and at that joyful Christmas dinner they were once more all together. Three years later the March girls had grown into young womanhood. Meg became Mrs. Brooke, and after a few family troubles got used to her new state happily. Jo had found pleasure in her literary efforts. Amy had grown into a young lady with a talent for design and an even greater one for society. But Beth had never fully regained her health, and her family watched her with love and anxiety. Amy was asked to go and stay in Europe with a relative of the Marches. Jo went to New York and became successful in her writing and had the satisfaction of seeing her work published there. But at home the bitterest blow was yet to fall. Beth had known for some time that she couldn't live much longer to be with the family and in the spring time she died. News came from Europe that Amy and Laurie, the grandson of a wealthy neighbor, had planned to be married soon. Now Jo became ever more successful in her writing and got married to Professor Bhaer and soon afterwards founded a school for boys. And so the little women had grown up and lived happily with their children,... Which of the following would be the best title for the passage? A) The march Family B) The March Parents C) The March Girls D) The March Relatives
C

A rising population is one of the main reasons that there is global warming. Between 1650 and 1850 the population increased by 0.75 billion people going from 0.25 billion to one billion. From 1930 to the end of the century the population rose from two billion to over six billion. In just a third of the time the population rose by more than five times what it did before. It is expected that this trend in the changing population will continue and could even heighten. The growing population requires increasing amounts of energy. These energy demands and other supplies require production, which almost always involves the emission of greenhouse gases. The more the population increases the more greenhouse gases that are produced and the greater the increase in temperature. The burning of fossil fuels is one of the best-known causes for global warming. The major reason for fossil fuels contributing so much to global warming is the release of carbon that occurs during the burning of fossil fuels. When people burn fossil fuels, they release large amounts of carbon by way of the release of carbon dioxide. The carbon dioxide in the air then leads to global warming. Another source of carbon dioxide comes from _ . In forests there is a large amount of carbon that is stored in the trees and other plants. This carbon is out of the atmosphere because the trees consume the carbon from carbon dioxide. When people cut down trees, they are frequently burned. This burning releases the carbon dioxide into the atmosphere that was stored in organic matter. Even when new trees are planted, it can take up to one hundred years to make up for the carbon that was released. It is commonly thought that because trees absorb more carbon dioxide, the atmosphere experiences positive effects. Sophie Armstrong, the writer of Earth Care put it, "There's no doubt that the earth is becoming warmer because of human activity rather than a random but natural phenomenon. To sum up from the passage, it is  _    that has caused global warming. A) human activity B) sources of energy C) natural forces D) the polluted atmosphere

A