Kids who use media in unhealthy ways may have problems {#blank#}1{#/blank#}relationships, conduct and other emotional symptoms, lead author of a US new study warned.

    A study of the University of Michigan (UM){#blank#}2{#/blank#} (release) recently on its website found that how children use the devices, rather than how much time they spend on them,{#blank#}3{#/blank#} (be) the strongest predictor of emotional or social problems connected with screen {#blank#}4{#/blank#}(addict ).

    The study revealed that {#blank#}5{#/blank#}matters most is whether screen use causes problems in other areas of life or has become{#blank#}6{#/blank#}all-consuming activity.

    Some of the warning {#blank#}7{#/blank#} (sign) include: if screen time interferes with daily activities, causes conflict for the child or in the family, or is the only activity {#blank#}8{#/blank#}brings the child joy. Though much research{#blank#}9{#/blank#} (exist) on adolescents and screen use, this is considered as the first tool to measure how addicted children are to screen media. It will be a{#blank#}10{#/blank#} (value) tool for parents, clinicians and researchers.

    It is quite clear that air planes provide {#blank#}1{#/blank#}efficient and convenient way to travel. Thanks to planes, the world we live in has become a {#blank#}2{#/blank#}(small) place. {#blank#}3{#/blank#} getting to somewhere by air can cause a lot of stress for people sometimes.

    There are many reasons {#blank#}4{#/blank#} an unpleasant journey, such as long lines at the airport or screaming kids who seat {#blank#}5{#/blank#}(them) behind you. However, recent {#blank#}6{#/blank#}（study) conducted by US travel platform Expedia have found that more than half of the people{#blank#}7{#/blank#}(survey) say what annoys them most are the passengers {#blank#}8{#/blank#} continually kick, bump or grab airplane seats.

    Why do they do that? Are they bored, nervous or just {#blank#}9{#/blank#}(complete) unaware? There is no sure answer to that question, it seems. According to Expedia, this behavior is likely{#blank#}10{#/blank#}(remain) one of the most common and hated parts of travelling by air.

    I met this elderly lady in town, {#blank#}1{#/blank#} I suppose may be someone's grandmother. The city has grown and everybody is so busy {#blank#}2{#/blank#} (walk), and at times shoving(挤着) other people. I'm not sure what made look at her as she walked slowly by with her wooden walking stick. Maybe it's because I wondered if I would reach that age and what I would be doing then if I did.

    {#blank#}3{#/blank#} (sudden), her stick dropped. I was not so sure if someone had pushed her or it just dropped accidentally. She tried reaching for it, but I noticed that bending was becoming a challenge to her. I moved towards her, although I thought that someone would have helped her by the time I{#blank#}4{#/blank#} (reach) her. I was wrong. Nobody seemed {#blank#}5{#/blank#} (notice) or cared much. I picked{#blank#}6{#/blank#} her stick and positioned it in her hand. She gave me {#blank#}7{#/blank#} wide, honest smile and thanked me. She raised her {#blank#}8{#/blank#} (eye) and said something nice to me, still smiling.

    I felt happy too, and will remember that it is {#blank#}9{#/blank#} (meaning) to slow down and take notice of what is happening around {#blank#}10{#/blank#} (we) and outside our own selves.

    Once, three men got {#blank#}1{#/blank#} (lose) in the forest. They decided they would stay in the forest until they found {#blank#}2{#/blank#} (they) way. The next morning, one man went to find some food. Soon, the other two men were {#blank#}3{#/blank#} (surprise) to find him back with a deer and asked how he got the deer. The man replied, “I found tracks, I followed the tracks, and I got a deer.” They both were {#blank#}4{#/blank#} (slight) confused because he had no weapons. A few days {#blank#}5{#/blank#} (late), the second guy went in search {#blank#}6{#/blank#} food and soon came back with a deer too. The other two asked how he managed {#blank#}7{#/blank#} (get) the deer. His reply was {#blank#}8{#/blank#} same as the first man's. Then it was the turn of the third guy to search for food. Many hours passed, and the third man {#blank#}9{#/blank#} (hold) nothing in his hands came back, with blood on his face. The other two asked him {#blank#}10{#/blank#} had happened. He looked at them and relied, “I found tracks, I followed the tracks, and I got hit by a train.”

    Experts have started working on {#blank#}1{#/blank#} unbelievable project to make a robot made by NASA act like a human.

    {#blank#}2{#/blank#}(name) Valkyrie, the robot looks like a woman and may be used to explorer Mars one day. It {#blank#}3{#/blank#} (invent) by NASA scientists to compete in the DARPA Robotics Challenges(DRC). It is 1.9 meters tall and {#blank#}4{#/blank#} (weight) 125 kilograms. It comes with a series {#blank#}5{#/blank#} cameras, sonar, and other sensors spread across its body to help it move around.

    Valkyrie is powered by a battery on its back, which can keep it {#blank#}6{#/blank#} (operate) for an hour. It can walk on {#blank#}7{#/blank#} (it) own, pick up objects and control many objects and tools, {#blank#}8{#/blank#}is part of the requirements for the DARPA challenge.

    The machine can walk on two legs and perform basic{#blank#}9{#/blank#} (move) at present. However, the team from Scotland's Edinburgh University wants to give it {#blank#}10{#/blank#} (many) skills. It is hoped that the new and improved robot will work along with astronauts in space.