China has become the first country to land a spacecraft on the far side of the moon. The unmanned Chang’e-4 probe (探测器) - the name was inspired by an ancient Chinese moon goddess     1     (touch) down last week in the South Pole-Aitken basin. Landing on the moon’s far side is     2     (extreme) challenging. Because the moon’s body blocks direct radio communication with a probe, China first had to put a satellite in orbit above the moon in a spot     3     it could send signals to the spacecraft and to Earth. The far side of the moon is of particular     4     (interesting) to scientists because it has a lot of deep craters (环形山)， more so     5     the familiar near side. Chinese researchers hope to use the instruments onboard Chang’e-4     6     (find) and study areas of the South Pole-Aitken basin. ＂This really excites scientists,＂ Carle Pieters, a scientist at Brown University, says, ＂because it     7     (mean) we have the chance to obtain information about how the moon     8     (construct)＂ Data about the moon’s composition, such as how     9     ice and other treasures it contains, could help China decide whether     10     (it) plans for a future lunar (月球的) base are practical.

In ancient China lived an artist    1     paintings were almost lifelike. The artist’s reputation had made him proud. One day the emperor wanted to get his portrait (画像) done so he called all great artists to come and present their     2     (fine) work, so that he could choose the best. The artist was sure he would    3    (choose), but when he presented his masterpiece to the emperor’s chief minister, the old man laughed. The wise old man told him to travel to the Li River～perhaps he could learn a little from the greatest artist in the world.

Filled with     4     (curious), the artist packed his bags and left.     5     he asked the villagers on the banks of the river where he could find the legendary (传奇的) artist, they smiled and     6     (point) down the river. The next morning he hired a boat and set out     7     (find) the well-known painter. As the small boat moved,     8     (gentle) along the river he was left speechless by the mountains being silently reflected in the water. He passed milky white waterfalls and mountains in many shades of blue. And when he saw the mists rising from the river and the soft clouds    9     (surround) the mountain tops, he was reduced to tears. The artist was finally humbled (谦卑) by the greatest artist     10     earth, Mother Nature.

Many people have the hobby of collecting things, e.g. stamps, postcards or antiques. In the 18th and 19th centuries,     1     (wealth) people travelled and collected plants, historical objects and works of art. They kept their collection at home until it got too big     2     until they died, and then it was given to a museum. The 80,000 objects collected by Sir Hans Sloane, for example,     3     (form) the core collection of the British Museum     4     opened in 1759.

The parts of a museum open to the public     5     (call) galleries or rooms. Often, only a small part of a museum’s collection     6     (be) on display. Most of it is stored away or used for research.

Many museums are lively places and they attract a lot of visitors. As well as looking at exhibits, visitors can play with computer simulations (模拟) and imagine     7     (they) living at a different time in history or     8    (walk)through a rainforest. At the Jorvik Centre in York, the city’s Viking settlement is recreated, and people experience the sights, sounds and smells of the old town. Historical     9     (accurate) is important but so is entertainment. Museums must compete     10    people’s spare time and money with other amusements. Most museums also welcome school groups and arrange special activities for children.

A 90-year-old has been awarded “Woman Of The Year” for     1    (be) Britain’s oldest full-time employee—still working 40 hours a week. Now Irene Astbury works from 9am to 5pm daily at the pet shop in Macclesfield,     2     she opened with her late husband Les. Her years of hard work have     3    (final) been acknowledged after a customer nominated(提名) her to be Cheshire’s Woman Of The Year.

Picking up her “Lifetime Achievement” award, proud Irene     4    (declare) she had no plans     5    (retire) from her 36-year-old business. Irene said, “I don’t see any reason to give up work. I love coming here and seeing my family and all the friends I     6    (make) over the years. I work not because I have to,     7     because I want to.”

Granddaughter Gayle Parks, 31—who works alongside her in the family business—said it remained unknown as to who nominated Irene for the award. She said, “We don’t have any idea who put grandma forward. When we got a call     8    (say) she was short-listed, we thought it was     9     joke. But then we got an official letter and we were blown away. We are so proud of her. It’s     10    (wonder).”

According to a review of evidence in a medical journal, runners live three years     1    (long) than non-runners. You don't have to run fast or for long    2    (see)the benefit. You may drink, smoke, be overweight and still reduce your risk of     3     (die) early by running. While running regularly can't make you live forever, the review says it     4     (be) more effective at lengthening life    5     walking, cycling or swimming. Two of the authors of the review also made a study published in 2014    6    showed a mere five to 10 minutes A day of running reduced the risk of heart disease and early deaths from all     7    (cause).

The best exercise is one that you enjoy and will do. But otherwise…   it's probably running. To avoid knee pain, you can run on soft surfaces, do exercises to    8    (strength)your leg muscles(肌肉),avoid hills and get good running shoes. Running is cheap, easy and it's always    9    (energy).If you are time poor, you need run for only half the time to get the same benefits as other sports, so perhaps we should all give    10    a try.

Some time after 10,000 BC, people made the first real attempt to control the world they lived     1     , through agriculture. Over thousands of years, they began to depend less on     2     could be hunted or gathered from the wild, and more on animals they had raised and crops they had sown.

Farming produced more food per person     3     hunting and gathering, so people were able to raise more children. And，as more children were born, more food     4    (need). Agriculture gave people their first experience of the power of technology     5    (change) lives.

By about 6000 BC，people     6     (discover)the best crops to grow and animals to raise. Later，they learned to work with the     7     (season)，planting at the right time and, in dry areas,     8     (make) use of annual floods to irrigate (灌溉) their fields.

This style of farming lasted for quite a long time. Then，with     9     rise of science, changes began. New methods     10     (mean) that fewer people worked in farming. In the last century or so, these changes have accelerated. New power machinery and artificial fertilizers (化肥) have now totally transformed a way of life that started in the Stone Age.

I'm not sure     1     is more frightened, me or the female gorilla(大猩猩）that suddenly appears out of nowhere. I'm walking on a path in the forest in the Central African Republic. Unexpectedly, I'm face-to-face with the gorilla, who begins screaming at     2     top of her lungs. That makes her baby scream, and then a 400-pound male appears. He screams the

    3    (loud)of all. The noise shakes the trees as the male beats his chest and charges toward me. I quickly lower myself, ducking my head to avoid     4    (look) directly into his eyes so he doesn't feel    5    (challenge).

My name is Mireya Mayor. I'm a     6    (science)who studies animals such as apes and monkeys. I was searching     7     these three western lowland gorillas I'd been observing. No one had seen them for hours, and my colleagues and I were worried.

When the gorillas and I frightened each other, I was just glad to find     8    (they) alive. True to a gorilla's unaggressive nature, the huge animal     9    (mean)me no real harm. He was just saying: "I'm king of this forest, and here is your reminder!" Once his message was delivered, he allowed me     10     (stay)and watch.

These days, it is not unusual for 10-to 12-year-olds to publish their own websites or for second and third graders    1    （begin）computer classes. At the same time, computer games are becoming increasingly popular as major publishing houses continue to develop    2    （education）computer programs for children in preschool. Also, technological know-how has become a    3    （require）for most jobs in an increasingly digital world, as the computer has become a common tool in most    4    （profession）

The Digital World is a set of volumes    5    aim to describe how digital systems influence society and help readers understand the nature of digital systems and their many interacting parts. Each volume in the set explores    6    wide range of material, explains the basic concepts of major applications of digital systems,     7    discusses the influences they have on everyday life. Because the number of possible topics    8    （be）practically limitless, we focus on a sample of the most interesting and useful applications and tools and explain the basic principles of technology. Readers    9    （encourage）to continue exploring the digital world with the guidance of    10    （we）Further Resources section featured in each volume.