David is a college student. Last year he went on vacation to Yunnan with his cousin, Cindy. First, they went to Kunming by plane. David liked the weather there. It was not cold or hot. It was really fine. Cindy liked all kinds of flowers best there.

    After two weeks, they went to Dali by train. They visited the famous Dali old city and some other places of interest there. They also knew about many local customs(当地的风俗).

    One week later, David and Cindy took the bus to Lijiang—a beautiful town. They visited Jade Dragon Snow Mountain(玉龙雪山). It was really wonderful. They also visited the old town of Lijiang. There were many interesting stores and restaurants there. They ate much fine food there. And Cindy bought many presents(礼物) for her sister Mary and her brother Bill. David had to come back to the university so they only stayed in Lijiang for one week.

    David likes Lijiang so much. He hopes to visit it this summer holiday again.

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    Many people thought that U.S. President Calvin Coolidge always lived in the White House. However, he sometimes lived in the nearby Willard Hotel.

    Once, in the middle of a night, the President woke up to see a thief searching his clothes. Coolidge calmly spoke up from the darkness, “I wish you wouldn't take that watch.”

    “Why?” asked the shocked man.

    Coolidged answered, “Take it near the window and read what is engraved（雕刻） on the back of it.”

    The man read, “Presented to Calvin Coolidged, Speaker of the House, by the Massachusetts General Court.” He was very surprised!

    “Are you President Coolidge?” he asked. He had never thought he would find the president sleeping in a hotel!

    “Yes, I am.” Coolidge said. Then he asked, “Why are you doing this, Son?”

    The young man explained that he and two friends traveled to Washington during their college vacation. They spent all of their money and had no money to pay the hotel bill and the train tickets back to school.

    Coolidge added up the cost. It came to $32. That may not sound like much now, but it was a big number then. “I'll give you the $32 as a loan(借款）,” the President said, “And I expect you to pay me back.”

    The young man thanked him. Coolidge left him with this warning: “Son, you are a nice boy, you are better than you are acting. You are starting down the wrong road. Just remember who you are.”

    It wasn't until after the death of Mr. Coolidge that this story was allowed to come out. It was first published in the newspaper Los Angeles Times. And the most interesting of all is that the President's notes show that the young man was indeed better than he was acting. He repaid the $32 loan in full.

    Students who get tired of looking at the four walls of a classroom might like to take the nature course being offered by Carvel College again this summer. Groups of about a dozen students each, led by an experienced guide, will go on ten-day camping trips to the mountains to study the plants and animals that grow and live there.（51题依据）

    Students carry their own things, which includes sleeping bags, warm clothing, food and water, and other useful tools. And what do the students do all day? Well, as soon as the sun comes up, they eat breakfast and start climbing up the mountain trail to the next campground（54题依据）, which is five to ten miles away. As the students take notes, the guide points out different plants and animals alongside the trail. The climb is usually over by early afternoon, so the group spends the rest of the day resting or swimming in a mountain lake. Before dinner each night, they all come together and discuss the day's activities.

    At the end of the course, the students write reports using the information they have collected. But they don't mind at all. What they do mind is leaving the beauty of the wilderness and the good friends they've made to return to their normal lives in the city.

    Thanks to the hybrid rice that was discovered by Yuan Longping, the hunger problem of thousands of Chinese people was mostly fixed in the 1980s.

    On Sept 8^th, Yuan, together with two other scientists, won China's 2018 Future Science Prize, for his continuous research on rice. Even on his 88th birthday on Sept 7^th, he took part in the International Development Forum of Rice Production in Hunan province. Although he was recovering from an illness at the time, he was happy to talk to reporters about his latest work on seawater rice.

    Yuan has been researching on rice since he was at college. In 1964, he discovered a natural hybrid rice plant in Hainan. Since then, he has focused on developing high﹣yield, hybrid rice varieties(多样性). In 1973. he became the first to successfully cultivate(培育) a type of hybrid rice species in the world. With the hard work of Yuan's group for about ten years, the production of the rice was increased.(From 150 kg per mu (亩) to 500 kg per mu and more. )These varieties now take up about two thirds of China's rice crop, according to China News. So, it's no wonder that he's known as the "Father of Hybrid Rice".

    And because of China's Belt and Road (一带一路)initiative. Yuan's hybrid rice is helping to solve food problems around the world. Indeed, according to Xinhua News Agency, hybrid rice plants in Kenya produce four to five times more rice than the country's usual nice plants.

    With a rising fame all over the world, Yuan gave a speech in English at the 9th Shandong High﹣Level Talents Forum in Qingdao last year. His speech made him an internet sensation. Beginning with" I speak broken English", his 20﹣minute speech turned out to be a huge success, with barely any pauses or mistakes. The humble Yuan was simply being modest during his speech. According to an article in 1999 by CNN, the scientist speaks both English and Russian fluently. "I never need an interpreter when I go overseas," he told the US news network.

    But in spite of his great knowledge, Yuan understands that even the wisest people should still be open to learn new things. "The farmers of our country possess rich experience in planting rice," he told Xinhua." We should learn from them."