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 recent years many TV shows have become extremely popular among Chinese audience. Those programs, ranging {#blank#}1{#/blank#} talent or dating shows to reality shows,{#blank#}2{#/blank#} (receive) both commercial success and public attention.

Their popularity is {#blank#}3{#/blank#} (main) based on simple facts. First, they care about social concerns. Second,  without exception, they explore a perfect balance between the international forms and Chinese expressions.

    Despite apparent highlights,  much room {#blank#}4{#/blank#} (leave) for improvement. Above all, commercial interests often outweigh  {#blank#}5{#/blank#} (education) purposes , causing many {#blank#}6{#/blank#} (complain) about the unbearable advertisements. In addition, some sharp remarks,{#blank#}7{#/blank#} they are eye-catching, may have misleading effects {#blank#}8{#/blank#} the youth.

    In my opinion, such shows should shoulder more responsibility instead of merely {#blank#}9{#/blank#} (entertain) the public.{#blank#}10{#/blank#} is expected, these programs should be positive in their forms as well as functions. Meanwhile, the media should also safeguard the values of our society.

    Cyclist Agustin Navarro was coming fourth in a race in Spain. But as he approached the finish line, he saw that his competitor Ismael Esteban had suffered a flat line and was running toward the finish line{#blank#}1{#/blank#} his bike over his shoulders. Agustin Navarro slowed down and refused{#blank#}2{#/blank#} (pass) him. Instead, he rode behind Ismael Esteban{#blank#}3{#/blank#} (allow) him to win the bronze medal.

    The people standing along the way applauded for Agustin Navarro's{#blank#}4{#/blank#} (behave) and cheered the two men as they made it toward the finish line —{#blank#}5{#/blank#} on foot; the other, on his bike. Mr. Esteban later tried to give{#blank#}6{#/blank#} prize to Agustin Navarro,{#blank#}7{#/blank#} he refused it.

    Agustin Navarro{#blank#}8{#/blank#} (praise) online for his unusual act since then. In a television interview, he told people that he didn't want to win like that, so he braked out of respect for somebody who had been{#blank#}9{#/blank#} (good) than himself. That's{#blank#}10{#/blank#} the spirit in a sport lies: respect competitors, teammates, coaches and even themselves.

    Astronauts are people who go out into space. Being an astronaut is an exciting job. While in space, astronauts can look down and see {#blank#}1{#/blank#}（cloud）, land, and water. They can even see the moon up close. Astronauts get the chance {#blank#}2{#/blank#}(see) more stars than you or I have ever seen. Being an astronaut may be exciting, {#blank#}3{#/blank#} it is not an easy job. A person who {#blank#}4{#/blank#}(want) to be an astronaut has to study for years. There are many things an astronaut must learn to do before going into space.

    Choice of seating in the lecture hall can affect a college student's performance, a study suggests.

    Lectures are a main part of higher education, and {#blank#}1{#/blank#}(understand) how students interact and learn within the lecture theatre environment is central to successful learning. Researchers from Sheffield Hallam University in the UK examined {#blank#}2{#/blank#} (student) reasons for choosing particular seats in a lecture hall, and investigated how seating positions are related {#blank#}3{#/blank#} students' performance.

    "Interaction is a key part of learning and knowing who the students are interacting with can be {#blank#}4{#/blank#} great benefit when designing activities," said David P Smith of Sheffield Hallam University.

    Many students {#blank#}5{#/blank#} (prefer) being able to sit with their friends, {#blank#}6{#/blank#} others were more concerned with either attracting or avoiding the lecturer's attention. Some students chose seats {#blank#}7{#/blank#} allowed them to see and hear clearly. But others {#blank#}8{#/blank#} (easy) picked seats that made them feel less depressed, they said.

    Friendship groups who sat together tended {#blank#}9{#/blank#} (achieve) similar grades, and students who sat alone at the edges were likely to do worse than average.

    Lecturers may be able to use these findings to offer assistance to {#blank#}10{#/blank#} (anxiety) students，and to support the learning of all students by encouraging interactions between the different groups.

    The Hong Kong-Zhuhai-Macao Bridge, the world's {#blank#}1{#/blank#} (long) cross-sea bridge, enters the history of human engineering and connection as a point of pride upon {#blank#}2{#/blank#} (it) opening to traffic at 9 a. m. on Oct.24, 2018.

    One day after the opening was announced at a ceremony {#blank#}3{#/blank#} (hold) in Zhuhai, the bridge's ports in three different administrative regions started serving travelers around-the-clock, opening 24 hours a day, seven days a week. {#blank#}4{#/blank#} (ensure) faster boundary crossings for passengers, the Macao and Zhuhai ports jointly use a one-off immigration clearance model, {#blank#}5{#/blank#} allows travelers to queue up only once to finish both exit and entry procedures of the two cities in about 30 {#blank#}6{#/blank#} (second).

    Apart {#blank#}7{#/blank#} private cars, taxis and goods vehicles, two types of public transportation -shuttle bus (班车) and cross-boundary coach—can also run on the HZMB. {#blank#}8{#/blank#} frequency of shuttle buses is about 5-10minutes during peak hours. Booking tickets for the shuttle bus online in advance {#blank#}9{#/blank#} (be) available since 9 a. m. on Tuesday. With the bridge now in service, the traveling time between Zhuhai and Hong Kong International Airport will {#blank#}10{#/blank#} (shorten) from four hours to 45 minutes, and the time between Zhuhai and Hong Kong's Container Terminals will be cut from 3. 5 hours to 75 minutes.