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根据短文内容，选择最佳答案，并将选定答案的字母标号填在题前括号内。

    Last year I ruined (毁) my summer vacation by bringing along a modem convenience that was too convenient for my own good: the iPad. Instead of looking at nature, I checked my email. Instead of paddling a small boat, I followed my Twitter feed (推特简讯). Instead of reading great novels, I stuck to reading four newspapers each morning. I was behaving as if I were still in the office. My body was on vacation but my head wasn't.

    So this year I made up my mind to try something different: withdrawal (退出) from the Internet. I knew it wouldn't be easy, since Fm bad at self-control. But I was determined. I started by giving the iPad to my wife.

    The cellphone signal (信号) at our house was worse than in the past, making my attempts at cheating an experience in frustration (沮丧). I was trapped, forced to go through with my plan. Largely cut off from email, Twitter and my favorite newspaper websites, I had few ways to connect to the world except for radio and how much radio can one listen to, really? I had to do what I had planned to all along: read books.

    This experience has had a happy ending. With determination and the strong support of my wife, I won in my vacation struggle against the Internet, realizing finally that it was I, not the iPad, that was the problem. I knew I had won when we passed a Starbucks and my wife asked if I wanted to stop to use the Wi-Fi. “I don't need it,” I said.

    However, as we return to post-vacation life, a harder test begins: Can I continue when Fm back at work? There are times when the need to know what's being said right now is great. And I have no intention (愿望) of giving up my convenience completely. But I hope to resist (抵抗) the temptation (诱惑) to check my email every five minutes, which leads to checking my Twitter feed and a website or two.

    I think a vacation is supposed to help you reset your brain to become more productive. Here I hope this one worked.

    In 2016, three viruses made news, and they present difficult problems for health officials in the New Year. One virus threatens babies in many parts of the world. Another has reappeared in an African nation. And a third is one of the deadliest viruses of modern times. The three viruses are Zika, polio and HIV. However, in 2016 scientists and researchers from all over the world worked to make progress against those viruses and to develop better ways to control them.

    The spread of the Zika virus caused public health officials in many nations to put in place strong measures to control its spread.

    Brazil, which hosted the 2016 Summer Olympic Games, was hit hard by the virus. Health officials warned pregnant women against traveling to the sporting event. Zika is usually a mild illness. It is so mild that most people who are infected do not know they have it. However, in the past two years in the Western Hemisphere, Zika has been linked to babies being born with extremely small heads. This condition is called microcephaly. The international medical community found that this link to birth defects makes Zika a very dangerous virus.

    Zika first appeared in Uganda more than 60 years ago. It is spread by mosquitos and by sex. The virus recently appeared in Brazil. Then cases appeared in other countries to the North. Cases were reported in the United States in the southern state of Florida. Health officials in Texas are also concerned the virus might be spreading there.

    Doctors can only advise women to be careful. They advise women not to travel to areas where the virus is spreading, to avoid mosquito bites or to delay pregnancy. Currently there is no vaccine against Zika. However, one could be available by 2018.

Queen Rider

    Bonnie Wyndham got out of her mother's car and looked at Almonside School. "I'll make you sorry I've come here," she told her, pleasantly. Her mother was getting out of the other door at the time so she didn't hear, but Bonnie wouldn't have cared if she had. Her mother knew her feelings. Mrs. Wyndham looked about her. Almonside was a funny school, all bits and pieces, buildings hidden away amongst the trees on a wooded hillside; very confusing at first sight. Then she saw the signs on a post: science block, gymnasium, riding centre ...

    "Riding centre," said Bonnie, showing a sudden interest. "Headmaster's study," said her mother. "This way."

    Bonnie followed her mother along a broad drive that curved between trees.

    "I wish you'd walk beside me instead of following me like a dog," said Mrs. Wyndham wearily, but she didn't seem to expect Bonnie to do so.

    A few minutes later, her mother was talking to Bonnie's new headmaster in his study, while Bonnie herself sat and waited outside the door. Suddenly, Bonnie jumped up. "Why should I just it here?" she said to herself. "I'll be thrown out before very long, anyway," she said mentally to the door, "so why not get it over and done with?" She left the building and headed for the riding centre in the direction indicated by the sign.

    There was a nice old building where the horses were kept, and a large structure for indoor riding. Bonnie looked about her, but there was no one in sight. There was a certain reverence about her manner as she approached the animals. Bonnie treated horses with respect. The horses were very well looked after, she could tell that at once.

    Almost every stall was occupied, and she wandered along looking carefully at each horse and judging it. "They know what they're doing here," she told a small pony as she ran a finger along its nose. It was the next horse that pulled her up short. "But aren't you the best of the lot!" she said. He was brown with a touch of white. Lively, probably, but Bonnie liked that. "You know, I have the feeling we've met before," said Bonnie, stroking his neck.

    "It was in my dreams and I was riding you to victory in some big competition." Over the stall was his name: Maverick.

Suddenly, she couldn't resist the temptation to ride the horse. "I wonder where I can find a bridle for your head, and a saddle for your back. Can't be far away." The room containing all the riding equipment was — Bonnie was delighted to discover — unlocked. Absorbed in the pleasurable task of putting a saddle on Maverick's back, she forgot all about her mother and the headmaster. When she sat up high on the big horse outside the building, she felt like a queen, mistress of all she could see. Her nickname at her previous school had been Queen Bee, and she laughed delightedly as she remembered it. You're the best horse I've ever sat on, Maverick, ' she said admiringly, "and when I say that I'm not kidding, I can assure you, because I know about horses, even if I don t know about anything else."

    She nudged him into a walk, then into a trot. "If I stay here, I think you and I could be great friends," she confided. She went round and round the paddock. The rhythm was exhilarating, a little breeze whipping smartly past her cheek and making it glow. She could tell Maverick trusted her, and she felt certain that he'd jump well.

    It is hard to say the first day of school in the United States because when the first day of school is and what happens on the first day of school usually are different by districts(地区).

    The first day of school for many school districts in different states is on the day after the first Monday in September. In some other school districts, school begins in mid-to-late August. For example, the Denver, Colorado schools go back in mid-August and schools in Cleveland, Ohio start back usually one week before the first Monday in September. The Boston, Chicago, New York City and San Diego schools start back on the Tuesday or Wednesday after the first Monday in September.

    Schools in Cleveland, Ohio used to start the school year on the day after the first Monday in September, but in the 1976-1977 and 1977-1978 academic years, the school year was affected by several bad snowstorms, extreme cold. In the 1978-1979 school year, the Ohio Department of Education moved the start of the year to late August, one week before the first Monday in September. This went into effect in the 1980-1981 school year.

    In most school districts in Utah, the school year starts between August 25 and August 30, and goes until the last week of May or the first week in June next year.

    In American high schools, the freshmen class usually goes back one or two days before the rest of the school body for an orientation(迎新)period. An orientation period helps the freshmen get familiar with their new school, its rules, and surroundings.

    In some schools, the freshmen classes have their photographs taken for identification purposes. Some high schools have tried to make the first week of school fun for incoming freshmen.

We were on the way from Hutchinson to Chicago for a short spring break. For many years I had wanted to take my family on the train. We all went to Chicago four years ago, and the kids loved it. Chicago is one of my favorite cities, too, so the thought struck me again last fall to ride the train to Chicago. Of course, flying would have been faster. But I don't think flying is easier, especially these days, with all the security and waiting in lines at airports.

Though we were tired in the middle of the night, the kids got on the train with the exhilaration of this adventure. "We're moving," my son William shouted happily with big eyes as the train began to pull away from the Hutchinson station.

I removed my shoes and lay down to try to finish my night's sleep. The sleeper car would have better enabled that, but the ordinary train seats were not too bad. An airline flight is a more miserable experience for me：not enough room, two hours of pain with my knees almost touching my chin, the hard seatback in front cracking my kneecaps (膝盖) with every move of the body planted in front of me. On the train I could almost outstretch all of my 6­foot­2­plus body in the generous legroom.

The journey didn't feel at all as long as it was. We all found the train ride a joy. The car ride would have felt every minute of 13 hours. But on the train you are free to walk around, sit in the observation carriage for a while and enjoy the scenery out the windows, have a nice meal in the dining car, read a book, or play a board game.

In short, the train is all about enjoying the trip, which isn't something I do so much when travelling by airline or by car, when the trip seems more of a mission (任务) to get there than an experience to enjoy along the way.

Chicago offers much to do for a family. This time, getting there was half the fun.