All scientists subscribe {#blank#}1{#/blank#} the view that it is human activities that have caused the global warming. Huge {#blank#}2{#/blank#} (quantity) of carbon dioxide produced by burning fuels like coal,  natural gas and oil {#blank#}3{#/blank#} (result) in the "greenhouse effect". All scientists also agree that the levels of carbon dioxide keep on {#blank#}4{#/blank#} (increase), so more heat energy tends to be {#blank#}5{#/blank#} (trap) in the atmosphere. {#blank#}6{#/blank#} the scientists have different attitudes towards this phenomenon. On the one hand, some think the {#blank#}7{#/blank#} of increasing the temperature by 5 degrees would be a catastrophe. On the other hand, others are {#blank#}8{#/blank#} to this view and believe that there will be few bad environmental {#blank#}9{#/blank#} caused by more carbon dioxide. On the contrary, they think it will be beneficial to plants, crops and a greater range of animals, {#blank#}10{#/blank#} will make people's life better.

    People have all turned to sad music to make themselves feel better at some point in their lives,

    {#blank#}1{#/blank#}why does the music with double or even triple(三倍) sadness help drag people out of low spirits?

    A new study throws light on what's going on inside people's brains when they match their music to their feelings, and it looks as if sad music can be enjoyable, rather than{#blank#}2{#/blank#}(simple) depressing. Music of this sort can arouse positive memories in people's life, thus {#blank#}3{#/blank#}(lift)their mood.

    Psychologist Adrian North from Curtin University in Australia says there{#blank#}4{#/blank#}(existence) two groups of possible explanations for why people enjoy listening to sad music like this——one from social psychology, and the other from cognitive neuroscience(神经学).

    {#blank#}5{#/blank#}terms of social psychology, one idea about this is that people will feel{#blank#}6{#/blank#}(good) about themselves if they focus on someone who's doing even worse. Everything's going to be okay, because this person is having {#blank#}7{#/blank#}even worse day than they are.

    Another idea from social psychology is that people like to listen to the very music {#blank#}8{#/blank#} shows their present life circumstances, because this kind of music makes them feel they are understood. With their emotions{#blank#}9{#/blank#} (share), they definitely get a certain amount of comfort.

    So, the{#blank#}10{#/blank#} (conclude) again—sad music does cheer people up, and it works far better than happy music, in most cases.

    A critical factor "that plays a part in people's susceptibility(敏感性)to colds is age. In the past four years, the University of the Michigan School of Public Health {#blank#}1{#/blank#} (do)a study, revealing some general ru1es for the public. It says that babies are most likely {#blank#}2{#/blank#} (catch)a cold. Babies will catch more than six colds during their first year {#blank#}3{#/blank#} average. Besides, boys have more colds than girls when they are under the age of three. When they grow older than three years old, {#blank#}4{#/blank#} is easier for girls to catch colds than boys. Girls might catch three colds, while boys catch two {#blank#}5{#/blank#} (annual).

    Generally speaking, the incidents of colds continue to decline while people are growing older. Elderly people who are in good {#blank#}6{#/blank#} (healthy)have as few as one or two colds every year. One exception is found among people in their {#blank#}7{#/blank#} (twenty), especially women, who show a rise in cold infections. This is {#blank#}8{#/blank#} people in this age group have young babies to bring up. Adults who delay {#blank#}9{#/blank#} (have)children until they are more than thirty experience {#blank#}10{#/blank#} same sudden increase in cold infections.

    When we read a poem, we often imagine what the poets{#blank#}1{#/blank#} (think) when they wrote or what they were doing at the time. These thoughts let us connect with the words better, as if we'd created the poem{#blank#}2{#/blank#} (we). Will a poem still mean as much if a compute writes it?

    By{#blank#}3{#/blank#} (use) algorithms (算法) , computers can now create all kinds of text, including research papers, books, news, stories and even poems. Computer-generated poems might be correct in both grammar and style, {#blank#}4{#/blank#}some say they still lack {#blank#}5{#/blank#} (create) and true meaning.

    Australian researcher Oscar Schwartz created a website{#blank#}6{#/blank#}(call) "bot or not". On his site, you can read poems and guess whether they{#blank#}7{#/blank#}(write) by a human or a computer. Schwartz recently gave a speech at TedX Sydney, in {#blank#}8{#/blank#}he stated that some of the website's poems were able to{#blank#}9{#/blank#}(foolish) 65 percent of human readers.

    He said that on his website, he hoped people would question the difference between humans and machines—and be able to identify what it is {#blank#}10{#/blank#}makes us human.

    I can still remember the day we brought her home from the animal shelter (收容所). Lexie moved in my arms when I held her, {#blank#}1{#/blank#} the second I handed this lovely dog to my daughter, she settled down. My daughter cried tears of joy while {#blank#}2{#/blank#}(hold) her on the way home and Lexie happily licked (舔) them away.

    Since then, they {#blank#}3{#/blank#}(be) good friends. They lie under blankets on the sofa and watch TV together. When my daughter climbs into bed, Lexie will carry her toys on top of the covers {#blank#}4{#/blank#} (join) her. Lexie's favorite spot is right in my daughter's arms. If she could spend every second of the day there, she {#blank#}5{#/blank#}.

    The other day I {#blank#}6{#/blank#}(watch) Lexie while my daughter, who lives right up the road from me, did some housework. When it was time {#blank#}7{#/blank#} Lexie to go home, I could see Lexie's {#blank#}8{#/blank#}(excite) as I leashed (用皮带牵) her up. I opened the back door and let her out. She was running as fast as she could. I called her name, but {#blank#}9{#/blank#} was no use. She had found my daughter on the road. My daughter bent down to pick her up. Lexie jumped into her arms and happily licked her face.

    I smiled, seeing she was back {#blank#}10{#/blank#} she belonged.