Researchers from the University of Michigan have found that astronauts' brains change shape during spaceflight. It is the first study {#blank#}1{#/blank#} (look) into how the brain changes in space. Researchers looked at high-tech MRI(磁共振成像)pictures of the brains of 26 astronauts who spent time in space. Twelve of the {#blank#}2{#/blank#} (astronaut) spent two weeks on the Space Shuttle, and 14 spent six months on the International Space Station. All of them {#blank#}3{#/blank#} (experience) increases and decreases in the size of {#blank#}4{#/blank#} (differ) parts of the brain. The longer an astronaut spent in space ,the {#blank#}5{#/blank#} (big) the size differences were.

    The research produced some {#blank#}6{#/blank#} (interest) findings. One was that on gravity means fluids do not drop in the body, {#blank#}7{#/blank#} there is a shift in the brain's position inside the skull. The brain becomes either smaller or bigger. The findings could help doctors to treat problems that affect the brain's function. They could treat people with problems {#blank#}8{#/blank#} (cause)by long-term bed rest. They could also help those who have a build-up of fluid in the brain, which can lead {#blank#}9{#/blank#} brain damage. We will understand more about {#blank#}10{#/blank#} neurons(神经元)in the brain connect. The findings will also help future trips to Mars.

    In many countries{#blank#}1{#/blank#} is not unusual for families of different backgrounds to live together in the shared space.{#blank#}2{#/blank#} ，in the United States, this idea may still be considered odd.

    But this type of housing{#blank#}3{#/blank#}(call) co-housing, is gaining{#blank#}4{#/blank#}(popular) in the United States, too. Co-housing complexes are popping up across the country. For many people, this way of life is a relief to the busy modern lifestyle. A co-housing community has{#blank#}5{#/blank#}(private) owned houses and shared land. There is often a “common house” with a kitchen and dining room, meeting room, and maybe a workshop of library or music room. About 25 co-housing communities{#blank#}6{#/blank#}(build) in recent years, and 150 more are planned.

    A co-housing complex is a place {#blank#}7{#/blank#} residents shop, cook, and eat together. Residents of a co-housing complex like its sense of shared community. Children have other kids to play{#blank#}8{#/blank#},{#blank#}9{#/blank#}many families like. Other residents like the feeling of living in a “ village”. Residents also say that they can live in co-housing for{#blank#}10{#/blank#}money than they would pay for nearby apartments.

Dear Dr. Fang

    I am writing to ask for some {#blank#}1{#/blank#} (suggest) about my 15-year-old son. At the moment, he refuses to do almost anything his mother and I ask him to do. He is also rude to {#blank#}2{#/blank#} grandparents. I don't like the way {#blank#}3{#/blank#} he treats the family members.

    Recently, he {#blank#}4{#/blank#}(refuse) to do his homework, and instead insists on {#blank#}5{#/blank#} (spend) his time watching DVDs and listening to music. He also spends too much time in Internet cafes, where he either plays games {#blank#}6{#/blank#}chats on the Internet. He is wasting {#blank#}7{#/blank#} (value) time during this important period in his life!

    What am I to do? {#blank#}8{#/blank#}present, to prevent upsetting his mother with {#blank#}9{#/blank#} argument, I am allowing him his freedom. How can I help my son {#blank#}10{#/blank#} harming our relationships?

Best regards

Liu Zhen

    One day, there was a blind man sitting at the roadside. There was a sign beside him, on{#blank#}1{#/blank#}was written, “I'm blind. Please help me." Many people walked by him,{#blank#}2{#/blank#}few of them helped him.

    A young man was going to his office. While{#blank#}3{#/blank#}(walk) by the blind man, he stopped and found that there were few coins in the man's hat. He bent down and write a new message on the sign without asking for{#blank#}4{#/blank#}(permit), and then he left, without saying a word.

    {#blank#}5{#/blank#}(late) that afternoon, when the young man walked by the blind man again, he saw the hat{#blank#}6{#/blank#}(fill) with bills and coins. The blind man recognized his footsteps and asked if{#blank#}7{#/blank#}was he that had changed his sign. He also wanted to know {#blank#}8{#/blank#}the young man had done to the sign. Then the young man told the blind man that he {#blank#}9{#/blank#}(write) something like this on the sign. “It is spring now, but I can't see it." The blind man expressed his gratitude to the young man and went home{#blank#}10{#/blank#}(happy).

    US writer Margaret Lee Runbeck once {#blank#}1{#/blank#} (write), "Happiness is not a station you arrive at, but {#blank#}2{#/blank#} manner of traveling." But traveling is not always happy, at least for the buddies in the movie Green Book.

    The movie {#blank#}3{#/blank#} (adapt) from the true story of a road trip through the southern US in the early 1960s. In the film, the black pianist Don Shirley hires Italian-American Tony to drive him to performances, but they face problems because of Shirley's skin color. These problems enable them {#blank#}4{#/blank#} (form) a special friendship.

    "There's something so deeply right about this movie, so true {#blank#}5{#/blank#} the time, said US film critic LaSalle. The time La Salle is talking about was between 1876 and 1963, {#blank#}6{#/blank#} African-Americans experienced a very different and difficult period. Many parts of the country had Jim Crow laws, which allowed {#blank#}7{#/blank#} (race) segregation (隔离). But in 1936, a blackmail carrier named Victor H. Green published a list of friendly {#blank#}8{#/blank#} (business) as a small book with a green cover. The Green Book helped African-Americans travel more safely. Then in 1964, Jim Crow laws went away. The book went away, too.

    Today many US people still remember the time of Jim Crow laws. But they {#blank#}9{#/blank#} (probable) don't know about The Green Book. It's a {#blank#}10{#/blank#} (forget) part of the story.