Since the beginning of human evolution, men have migrated（迁移）across continents in search of food, shelter, safety, and comfortable weather. People still move for these reasons, but new reasons for human migration are arising, such as job relocation(重新安置) and overpopulation.

    Three million migrants are moving from poor countries to wealthier ones each year, and increasingly, their destination is a neighboring country in developing parts of the world. People are moving within the developing world for the same reasons as they migrate to wealthier nations. People from poor countries are going to less poor countries, fleeing wars and conflicts. They are also responding to population pressures because some countries are densely populated, and they often have high population growth. Those people need to go somewhere else.

    There are three main reasons why people move. The basic categories and percentages are as follows, according to the Current Population Surveys (CPS):

    Family-related reasons account for 26.3%, including changes in marital（婚姻的） status, establishing a household and other family reasons; work-related reasons 16.2%, including job transfer, retirement, and other job-related reasons; housing-related reasons 51.6%, including new and better houses, better neighborhood, cheaper housing and other housing reasons; the remaining 5.9% of other reasons are attending college, the change of climate and health reasons.

    Americans have been migrating south and west for decades in search of better job opportunities and warmer climates. They have also been moving to places a little far from cities, in search of bigger yards and houses, lower crime rates and better schools. In 1950, nearly a fifth of the population lived in the nation's 20 largest cities. In 2006, it was about one in ten. That's why many American people say, “Big Cities Shrink as People Move South, West.”

    Between March 2005 and March 2007, 73.4 million Americans moved. Fifty-six percent of these moves were within the same country. Twenty percent were between counties but in the same state. Nineteen percent were moves to a different state. Some families even went abroad.

Title: People on the {#blank#}1{#/blank#}

    It is very important for kids to be courageous. A brave child is more likely to withstand negative peer pressure, say no to temptations（诱惑）and flight the good fight.{#blank#}1{#/blank#} It boosts kids' resilience（适应力）, confidence and willpower as their as well as their learning, performance and school engagement. Here are several ways to develop kids' courage:

    Model courage. Kids who watch their parents stick their necks out to do the right thing are more likely to do the same.{#blank#}2{#/blank#} Then express how good it feels when you conquer your fear instead of taking a shortcut. Your kids will learn how to take on the tough challenge they face by witnessing how you tackle your fears.

    {#blank#}3{#/blank#} Research finds that kids are more likely to be courageous if they believe that their parent them to support those in need. Discuss bravery with your kids: Tell hem Courage is making the choice to do what you know is right even if you are afraid.”

    Ask your kids to share their acts of bravery. Learning to be brave takes practice, so encourage your children to do something courageous every day.{#blank#}4{#/blank#}A mom I talked to had her kids share their brave deeds at dinner time.

Teach your kids how to reduce their fears. If not kept under control, fear can be powerful.{#blank#}5{#/blank#} You might encourage positive self-talk, such as saying, “I can handle this” or “I have courage to do this.” Or teach your child to take slow, deep breaths to find courage.

A. Talk about values and courage.

B. Courage has other surprising benefits.

C. The good news is that courage can be taught.

D. Teach your child simple strategies to be brave.

E. Let your child see you step out of your comfort zone.

F. In today's uncertain world, kids will need courage and confidence.

G. Then take time to focus on their courageous breakthroughs.

    Moving to a foreign country is an amazing, life-changing experience. There are some practical decisions that need to be made.{#blank#}1{#/blank#}For me, choosing to live with a French with a French family was the best choice I made, and here is why.

    {#blank#}2{#/blank#} When you're in a new environment with people you don't know who are speaking a language you're still not fluent in, you might feel lost, tired and homesick—I know I did.{#blank#}3{#/blank#}They showed me which buses to take to get to work, cooked dinner for me so we could eat together, and took me with them on trips to the beach, the theatre and even a bullfight. These were great opportunities to experience French culture and build relationships. They helped me feel more comfortable and welcome.

    Living with French people has improved my language skills. Being constantly exposed to real French conversation has allowed me to learn new phrases, widen my vocabulary and even improve my accent. My host family are happy to answer my questions and correct me when I say things wrong.{#blank#}4{#/blank#}

    The experience of living abroad is one that you will remember forever. Perhaps the friendships, like the memories, will also last.{#blank#}5{#/blank#}You might return for their birthdays, weddings, holidays, and much more. I hope to remain in contact with my host family long after I leave France because when I was away from my friends and loves ones, they welcomed me and made me part of their family.

A. One such decision is choosing where to live.

B. You can stay in your own space and privacy.

C. Your host family might become your life-long friends.

D. It makes me a better and more confident French speaker.

E. However, my host family was wonderful and welcoming.

F. A family can help you settle in, stopping you from feeling lonely.

G. It's an opportunity to meet new people, a different culture and another language.

注意：每空一词。

    A recent study points out a so-called “gender-equality paradox(性别平等悖论)”: there are more women in STEM (science, technology, engineering, mathematics) in countries with lower gender equality. Why do women make up 40 percent of engineering majors in Jordan, but only 34 percent in Sweden and 19 percent in the U.S.? The researchers suggest that women are just less interested in STEM, and when liberal Western countries let them choose freely, they freely choose different fields.

    We disagree.

    From cradle to classroom, a wealth of research shows that the environment has a major influence on girls' interest and ability in math and science. Early in school, teachers, unconscious prejudice push girls away from STEM. By their preteen years, girls outperform boys in science class and report equal interest in the subject, but parents think that science is harder and less interesting for their daughters than their sons, and these misunderstandings predict their children's career choices.

    Later in life, women get less credit than men for the same math performance. When female STEM majors write to potential PhD advisors, they are less likely to get a response. When STEM professors review applications for research positions, they are less likely to hire “Jennifer” than “John,” even when both applications are otherwise identical—and if they do hire “Jennifer,” they pay her $4,000 less.

    These findings make it clear that women in Western countries are not freely expressing their lack of “interest” in STEM. In fact, cultural attitudes and discrimination are shaping women's interests in a way that is anything but free, even in otherwise free countries.

    “Gender-equality paradox” research misses those social factors because it relies on a broad measure of equality called the Gender Gap Index (GGI), which tracks indicators such as wage difference, government representation and health outcomes. These are important markers of progress, but if we want to explain something as complicated as gender representation in STEM, we have to look into people's heads.

    Fortunately, we have ways to do that. The Implicit Association Test (IAT) is a well-validated tool for measuring how tightly two concepts are tied together in people's minds. The psychologist Brian Nosek and his colleagues analyzed over 500,000 responses to a version of the IAT that measures mental associations between men/women and science, and compared results from 34 countries. Across the world, people associated science more strongly with men than with women.

    But surprisingly, these gendered associations were stronger in supposedly egalitarian (主张平等的) Sweden than they were in the U.S., and the most pro-female scores came from Jordan. We re-analyzed the study's data and found that the GGI's assessment of overall gender equality of a country has nothing to do with that country's scores on the science IAT.

    That means the GGI fails to account for cultural attitudes toward women in science and the complicated mix of history and culture that forms those attitudes.

    Attachment is not just a connection between two people; it's a bond that involves a desire for regular contact with that person and the experience of distress(悲伤) during separation from that person.

    According to psychologist John Bowilby, there are four critical characteristics of attachment. The first is the desire to be near those with whom we share an attachment since we are happy while staying with them. Attachments also create a safe shelter, meaning that during times of distress, fear, or uncertainty, we may seek out the people we're attached to for care and comfort. Next, attachment figures also offer a secure base for exploration. This is particularly important during childhood. This secure base allows kids to explore the world while they know they can still return to the safety of the attachment figure. Finally, we experience separation distress when parted from an attachment figure. For example, kids tend to become upset when parents have to leave them in the care of others.

    Attachment serves a number of important purposes. For instance, it helps keep babies and children close to their caregivers so that they can avoid potential dangers, which in turn helps boost their chances of survival. However, if a child doesn't form a secure attachment to a caregiver, he or she will suffer from a number of problems including conduct disorder and oppositional -defiant (对立反抗的) disorder. Researchers also suggest that the type of attachment displayed early in life can have a lasting effect on later adult relationships.

    Psychologist Harry Harlow conducted an experiment on social isolation in monkeys. Baby monkeys were separated from their mothers and placed with surrogate mothers (代母). One mother was simply a wire armature (电枢) that held a bottle, while the other mother was covered with a soft terry cloth material. Harlow found that the baby monkeys would receive food from the wire mother, but preferred to spend most of their time with the soft mother. When compared to monkeys that had been raised by their birth mothers, the monkeys raised by surrogate mothers were shyer and more nervous and suffered from social and emotional problems.

All in all, developing secure and healthy attachments early in life is very important. Such attachments play a vital role in our future development.

    The environmental group Heal the Bay organized a beach clean-up. And I was one of the volunteers. We went to Venice Beach to clean up the trash.

    At first glance, the beach didn't look dirty at all. But then I saw a Styrofoam(泡沫)cup half buried in the sand on the beach. I pulled hard and finally got it out. As we moved farther, we found pieces of Styrofoam spread all over the sand. The Heal the Bay representative had told us that these little pieces of Styrofoam and other small pieces of plastic are what actually harm sea life most. Sea animals eat the plastic. After eating it, they think they are full. As a result, they can die of starvation as they are cheated by their feeling and don't think they need to eat any food.

    We kept on picking up the trash. Then I saw someone with a full Heal the Bay trash bag and I went to see what was inside. When I opened the trash bag, I found everything from a pair of old jeans and a brown belt to headphones and some plastic bags. It made me very angry with the people who left their things behind without thinking what effects they might have on the ocean.

    It is really important to protect the ocean. The ocean covers 70 percent of the Earth's surface. A clean ocean not only helps animals in the ocean survive but also helps us survive.

    By noon, the sun was shining and the temperature was rising. The volunteers that had spread out across Venice Beach were coming back to throw the trash they had collected into the truck. I could not believe how much trash there was. All together we collected more than 135 bags of trash. I do hope that next time people go to the beach, they will stop littering.