Andy never wanted to go to bed on time. His parents had explained to him how important it was to go to bed early and get a good rest. But Andy paid no attention to them, and they didn't know what to do until one weekend when they were visiting Andy's grandparents.

    Grandpa Peter heard all about it and said, "This sounds like a job for Tubby." So Andy's parents loaded the cat onto the car and returned home.

That night, at bedtime, the same problem happened. Andy didn't want to go to bed, and even though his parents waited a while to see if Tubby would solve the problem, nothing happened.

    Hours later, Andy finally decided to go to bed. But what a surprise when he entered his bedroom! Tubby was in his bed, totally sprawling out, pot-belly in the air, and snoring like an express train.

    Andy tried to move the cat, but there was no way of moving him an inch. That night he hardly slept, lying on one tiny corner of his bed.

    The next day the same thing happened, even though Andy was much more tired from not having slept well. When the third day arrived, he had understood that if he wanted to sleep in his bed, he would have to get into it before Tubby did. That night, when his parents only started to mention the topic of bedtime, Andy rushed upstairs and dived into bed. His parents could not believe it. They knew nothing about Tubby in the bed, nor did they understand why Andy went to bed on time without complaint. They were so happy about this that they stayed up quite late, celebrating.

阅读下列短文，从每题所给的四个选项 （A 、B 、C  和 D ）中，选出最佳选项。

    Most people have heard of Shakespeare and probably know something of the plays that he wrote. However，not everybody knows much about the life of this remarkable man，except perhaps that he was born in the market town of Stratford upon Avon and  that he married a woman called Anne Hathaway. We know nothing of his school life. We do not know，for example，how long it lasted，but we presume that he attended the local grammar school，where the principal subject taught was Latin.

    Nothing certain is known for what he did between the time he left school and his departure for London. According to a local legend，he was beaten and even put in prison for stealing rabbits and deer from the estate of a neighboring landowner，Sir Thomas Lucy. It is said that because of this he was forced to run away from his native place. A different legend says that he was apprenticed to a Stratford butcher，but did not like the life and for this reason decided to leave Stratford.

    Whatever caused him to leave the town of his birth，the world can be grateful that he did so. What is certain is that he set his foot on the road to fame when he arrived in London. It is said that at first he had no money or friends there，but that he earned a little by taking care of the horses of the gentlemen who attended the plays at the theatre. In_time ， as he became a familiar figure to the actors in the theatre，they stopped and spoke to him. They found his conversation so brilliant that finally he was invited to join their company.

    Twelve years ago, I arrived in Central Florida from Puerto Rico. I had heard of a job opportunity and decided to pursue it. But it never became a reality. I quickly learned that being alone without resources in an unfamiliar city was not a comfortable situation to be in.

    Once my limited funds ran out I became homeless and spent a year and a half living on the streets of Orlando. Apart from feeling not being noticed and missing my family, I had to face another challenge—hunger.

    For the first time in my life, I, as a foreign man, who had lived my life in the relative comfort of the middle class, understood the desperation someone feels when they don't get enough to eat. I clearly remembered having run a distance of more than 7 miles on many occasions just to make it to a local feeding program before they closed at 7 pm.

    Once the need for food was met, the next challenge would arise—where to find a place to sleep for the night. Fortunately, local programs like the Coalition for the Homeless, Second Harvest Food Bank and the Wayne Densch Center were an important part of my ability to survive my painful experience.

    With the assistance of these programs, I was accepted by a college scholarship program through the Coalition and obtained two degrees from Valencia.

    My experience has helped me understand that devoting my life to helping others offers lasting rewards. Today, I am employed as Childhood Hunger Programs Manager at Second Harvest Food Bank and oversee the summer feeding, Hi-Five Kids Pack, and Kids Café programs. I am so proud to be able to distribute food resources to those wonderful programs and help hundreds more like me.

    The quality of our seafood has been in the news a lot lately. A new study has found that people who eat seafood are also eating plastic — 11,000 pieces of microplastic per year to be exact.

    Researchers at the University of Ghent in Belgium found that seafood eaters are consuming plastic at a concerning rate.

    “Per serving of mussels (贻贝), which contains about 300 grams of mussel meat, you get 300 pieces of plastic inside your body,” researchers wrote. Researchers don't yet know the implications of eating microplastic, but they worry that it could have negative consequences on our health.

    While we don't know what microplastic does yet to humans, we do know what it does to sea animals. In earlier studies, scientists have found that when fish eat microplastics, it prevents their growth and changes their feeding patterns. In fact, fish will stop eating natural sources of nutrients, and only go for plastic.

    When you're done using plastic, a small portion (部分) may be recycled. However, more than likely it's in a landfill or making its way towards the ocean. Once rubbish hits the water, sea creatures may mistake it for food. This often leads to poisoning or death. If they get caught for human's food, the plastic may very well make its way back to you — on your dinner plate.

    According to a study published in Science magazine, eight million tons of plastic go into our waterways every year. The problem is so serious that scientists say that by 2050 the weight of plastic in our oceans will outweigh fish. And just because it's out of sight, it doesn't mean it should be out of mind.

    There's no immediate way to prevent microplastic from ending up in your body. However, you can help reduce the amount of plastic reaching rivers, lakes and oceans in the first place. You can make a difference with your choices every day. Even small changes will add up. While your dinner may contain microplastic, you can help prevent the future generations from having that same problem.

    Self-driving vehicles have been proposed as a solution for the rapidly increasing number of fatal traffic accidents, which now cause 1.3 million deaths each year.

    While we have made great progress in advancing self-driving technology, we have yet to explore how autonomous vehicles will be programmed to deal with situations that endanger human life, according to a new study published in Frontiers in Behavioral Neuroscience.

    To understand how self-driving cars might make these judgments, the researchers looked at how humans deal with similar driving dilemmas.

    When faced with driving dilemmas, people show a high willingness to sacrifice themselves for others, make decisions based on the victim's age and turn onto sidewalks to minimize the number of lives lost. Ethical（伦理的）guidelines tend to disagree with human instincts（本能） in this case, saying that no life should be valued above another.

    “The technological advancement and adoption of autonomous vehicles are moving quickly but the social and ethical discussions about their behavior are lagging behind,” says lead author Lasse T. Bergmann from University of Osnabrück, Germany.

    Automated vehicles will eventually outperform their human counterparts, but there will still be circumstances where the cars must make an ethical decision to save or possibly risk losing a human life.

    The study is especially relevant considering earlier this year a self-driving Uber car struck and killed a passenger in Arizona, in an incident widely regarded as the first death resulting from an autonomous vehicle.

    An ethics commission launched by the German Ministry for Transportation has created a set of guidelines, representing its members' best judgement on a variety of issues concerning self-driving cars. These expert judgments may, however, not reflect human instinct.

    Bergmann and colleagues developed a virtual reality experiment to examine human instinct in a variety of possible driving situations. It was based on the well-known ethical thought experiment—the trolley problem.

    In this experiment, there is a trolley running down the railway tracks. Ahead, on the tracks, there are five people tied up, unable to move, and the trolley is headed straight for them. A person is standing some distance off in the train yard, next to a lever（操作杆）.If he pulls this lever, the trolley will turn to a different set of tracks. However, there is one person tied up on the side track. Does the person choose to pull the lever and kill one person, or do nothing and let five people die?

    Bergmann recognized that the majority of people would not approve of the proposal made by the ethics commission that a passenger in the vehicle should not be sacrificed to save more people. “We find people chose to save more lives, even if this involves turning onto the sidewalk, endangering people uninvolved in the traffic incident,” said Bergmann, “Furthermore, subjects considered the factor of age, for example, choosing to save children over the elderly.” He also realized further discussion and research were needed. “Driving requires a complex weighing of risks versus rewards, for example, speed versus the danger of a critical situation,” Bergmann explained.

    I can proudly say that last year I broke the record for the oldest person in the world to ride a roller-coaster. I'm 105, but I feel younger. Even the doctor agrees I'm in good condition. I'm a bit deaf and my legs feel weak, but they are the only issue.

    I rode the Twistosaurus at Flamingo Land, which spins you round quite fast. I didn't choose to go on that. I'd have preferred a really fast one that went upside down. But I was told I couldn't ride something like that, because my blood pressure could drop and I might have some danger.

    I wasn't nervous — I don't get frightened of anything. I was securely fastened, so I knew I wouldn't fall out. The roller-coaster ride went on for three or four minutes, and it couldn't be a better experience. And I raised a lot of money for the Derbyshire, Leicestershire & Rutland Air Ambulance fund, which was fantastic.

    People were saying I'd got a place in the Guinness World Records. Later, someone came to present me with the certificate. I had it on the wall in my living room, with another one that got a year earlier.

    My record-breaking ways really began a couple of years ago, with the ice-bucket challenge. It turned out that I was probably the oldest person in the world to do it, and the video was very popular. After that, I stared to think about what else I could do to raise money for different charities.

    I'm not sure if anyone admires all the fun I'm having. They just say I'm daft and that's about it. But I've had many good days and many exciting times. I've had a really good life. I don't think I've wasted any of it.