Biologists believe that love is fundamentally a biological rather than a cultural construct, because the capacity for love is found in all human cultures and similar behavior is found in some other animals. In humans the purpose of all the desire is to focus attention on the raising of offspring. Children demand an unusual amount of parenting, and two parents are better than one. Love is a signal that both partners are committed, and makes it more likely that this commitment will continue as long as necessary for children to reach independence. But what does science have to say about the notion of love at first sight? In recent years the ability to watch the brain in action has offered a wealth of insight into the mechanics of love. Researchers have shown that when a person falls in love, a dozen different part of brain work together to release chemicals that trigger feelings of euphoria, bonding and excitement. It has also been shown that the unconditional love between a mother and a child is associated with activity in different regions of the brain from those associated with pair-bonding love. Passionate love is rooted in the reward circuitry of the brain--the same area that is active when humans feel a rush from cocaine. In fact, the desire, motivations and withdrawals involved in love have a great deal in common with addiction. Its most intense forms tend to be associated with the early stages of a relationship, which then give way to a calmer attachment form of love one feels with a long term partner. What all this means is that one special person can become chemically rewarding to the brain of another. Love at first sight, then, is only possible if the mechanism for generating long-term attachment can be triggered quickly. There are signs that it can be. One line of evidence is that people are able to decide within a second how attractive they find another person. This decision appears to be related to facial attractiveness, although men may favor women with waist-to-hip ratio of 0.7, no matter what... When a person falls in love,   _  . A) he feels as if he were addicted to cocaine B) he will be committed to the beloved as long as necessary C) he will experience a calmer attachment form of love before he feels the extreme love D) he will experience complex feelings brought on by different regions of his brain
D


When other nine-year-old kids were playing games , she was working at a petrol station.When other teens were studying or going out , she struggled to find a place to sleep on the street.But she overcame these terrible setbacks to win a highly competitive scholar and gain entry to Harvard University. Her amazing story has inspired a move , " Homeless to Harvard : The Liz Murray Story ", shown in late April. Liz Murray , a year- old American girl , has been writing a real-life story of willpower and determination. Liz grew up in the shadow of two drug-addicted.There was never enough food or warm clothes in the house.Liz was the only member of the family who had a job. Her mother had AIDS and died when Liz was just 15 years old.The effect of that loss became a turning point in her life.Connecting the environment in which she had grown up with how her mother had died , she decided to do something about it. Liz went back to school.She threw herself into her studies , never telling her teachers that she was homeless.At night , she lived on the streets. " What drove me to survive had to do with understanding , by understanding that there was a whole other way of being.I had only experienced a small part of the society , " she wrote in her book " Breaking Night ". She admitted that she used envy to drive herself on.She used the benefits that come easily to others , such as a safe living environment , to encourage herself that " next to nothing could hold me down ". She finished high school in just two years and won a full scholarship to study at Harvard University.But Liz decided to leave her top university for a couple of moths earlier this year in order to take care of her father , who has also developed AIDS." I love my parents so much.They are drug addicts.But I never forget that they love me all the time." Liz wants moviegoers to come away with the idea that changing your life is " as simple a making a decision." When she wrote " I had only experienced a small part of the society ", she   _ A) wanted to encourage herself B) suggested something she wanted for her life C) suggested people often look back D) meant that she had little experience
B


Q: Siberia is a huge territory in Russia. It is more than half of Russia and is 4,000 miles wide.  Most of this area is a forest with animals and birds. In autumn, the forests in Siberia are full of mushrooms and berries . Many people like picking mushrooms, but that is not as simple as you might think. Old people who live in the villages know places where you can pick lots of mushrooms. Some mushrooms grow in colonies. If you find one, you only need to look around because nearby you'll find more of them. However, when picking mushrooms, it is important not to choose the wrong kind. You have to be careful because some mushrooms are poisonous even though they look good. The smell can help you choose them, because good mushrooms smell very good. Siberian people are very friendly and hospitable. If someone invites you home for dinner, you'll soon be full. You should try everything the host is having. The climate there depends on the territory. Some places have very comfortable climates with hot summers and cold winters. In my opinion, the best season is spring, when nature wakes up after a long winter. It is the time for blossoms and love. Birds come back from other warm countries. Trees become dressed in green. The sun becomes warm and the days are longer. The mood is wonderful and people smile a lot. It is an amazing time. In winter, you have opportunity for sports. The most popular sport in winter in Russia is cross-country skiing. During weekends, many people go into the country and ski. Noses freeze and cheeks hurt, but people continue to enjoy these times. Which of the following is NOT a characteristic of Siberia in spring? A) The night is longer. B) Tress turn green. C) It is warmer. D) There are many birds.

A: A