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Dear Bobby Brune，
Children learn best when they're having fun. “Jungle Gym Jimmy”is an article for parents and children that teaches playground safety and shows how simply playing can promote good health and fitness. The tips are given through the funny voice of the“tour guide”on the playground，seven—year-old Jimmy. By listening to Jimmy, children learn how to use the equipment safely and how to get the most fun out of a day on the playground.
As a Kid Talk subscriber for the last seven years. I am very familiar with your publication, and feel this article would be a positive addition to the “I Can Do It” section of the magazine. The article is 2，114 words，and has been divided into categories in a way that holds children's interest. Being a mother of four children and using our home as a meeting place for most of the neighborhood，I've had the opportunity to test and confirm that the fun and easy “exercises” offered here are not only effective but are lots of fun for kids.
I've been writing children's stories and articles for several years, and have had many of my stories published in Kids Know Best，a small newspaper that the Cinder Primary School publishes each month. I'm also a founding member of the“Right On Baby”editorial group which publishes a monthly e—zine for parents with newborns, and I’m a contributing editor to “Write Now,” an online site that teaches creative writing.
Thank you for your time.
Sincerely,
Claudia Parker
1.The author has written this letter to a _________.
A. magazine B. website
C. newspaper D. primary school
2.By writing the third paragraph，the writer wants to show that she ________.
A. is experienced in writing articles for children
B. writes lots of articles about her own children
C. often reads different stories for her children
D. is good at designing activities for children.
3.The purpose of the letter is to _______.
A. open a new section in a publication for parents
B. start a game to promote good health and fitness
C. organize a class teaching children how to play safely
D. recommend an article on how to have fun on the playground
难度: 困难查看答案及解析
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Let us all raise a glass to AlphaGo and the advance of artificial intelligence. AlphaGo，
DeepMind’s Go-playing AI，just defeated the best Go-playing human，Lee Sedol. But as we drink to its success. we should also begin trying to understand what it means for the future.
The number of possible moves in a game of Go is so huge that. in order to win against a player like Lee. AlphaGo was designed to adopt a human—like style of gameplay by using a relatively recent development--deep learning. Deep learning uses large data sets，“machine learning”algorithms （计算程序） and deep neural networks to teach the AI how to perform a particular set of tasks. Rather than programming complex Go rules and strategies into AlphaGo，DeepMind designers taught AlphaGo to play the game by feeding it data based on typical Go moves. Then，AlphaGo played against itself, tirelessly learning from its own mistakes and improving its gameplay over time. The results speak for themselves.
Deep learning represents a shift in the relationship humans have with their technological creations. It results in AI that displays surprising and unpredictable behaviour. Commenting after his first loss，Lee described being shocked by an unconventional move he claimed no human would ever have made. Demis Hassabis. one of DeepMind's founders，echoed this comment：“We're very pleased that AlphaGo played some quite surprising and beautiful moves. ”
Unpredictability and surprises are—or can be—a good thing. They can indicate that a system is working well，perhaps better than the humans that came before it. Such is the case with AlphaGo. However，unpredictability also indicates a loss of human control. That Hassabis is surprised at his creation's behaviour suggests a lack of control in the design. And though some loss of control might be fine in the context of a game such as Go，it raises urgent questions elsewhere.
How much and what kind of control should we give up to AI machines? How should we design appropriate human control into AI that requires us to give up some of that very control? Is there some AI that we should just not develop if it means any loss of human control? How much of a say should corporations，governments，experts or citizens have in these matters? These important questions, and many others like them，have emerged in response，but remain unanswered. They require human，not human - like，solutions.
So as we drink to the milestone in AI, let's also drink to the understanding that the time to answer deeply human questions about deep learning and AI is now.
1.What contributes most to the unconventional move of AlphaGo in the game?
A. The capability of self-improvement.
B. The constant input of large data sets.
C. The installation of deep neutral networks.
D. The knowledge of Go rules and strategies.
2.A potential danger of Al is _____.
A. the loss of human control B. the friendly relationship
C. the fierce competition D. the lack of challenge
3.How should we deal with the unpredictability of AI?
A. We should stop AI machines from developing even further.
B. We should call on the government to solve these problems for us.
C. We should rely on ourselves and come up with effective solutions.
D. We should invent even more intelligent machines to solve everything.
4.What's the author’s attitude towards this remarkable advance in AI?
A. Supportive. B. Optimistic.
C. Doubtful. D. Cautious.
难度: 中等查看答案及解析
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Seeds on Ice
Close to the North Pole，remote and rocky Plateau Mountain in the Norwegian archipelago of
Svalbard seems an unlikely spot for any global effort to safeguard agriculture. In this cold and deserted environment，no grains，no gardens，no trees can grow. Yet at the end of a 130-meter-long tunnel cut out of solid stone is a room filled with humanity’s most precious treasure, the largest and most diverse seed collection—more than a half-billion seeds.
A quiet rescue mission is under way. With growing evidence that unchecked climate change-will seriously affect food production and threaten the diversity （多样性） of crops around the world，the Svalbard Global Seed Vault （地窖） represents a major step towards ensuring the preservation （贮藏） of hundreds of thousands of crop varieties. This is a seed collection, but more importantly, it is a collection of the traits found within the seeds：the genes that give one variety resistance to a particular pest and another variety tolerance for hot，dry weather.
Few people will ever see or come into contact with the contents of this vault. In sealed boxes，behind multiple locked doors，monitored by electronic security systems, enveloped in below—zero temperatures, and surrounded by tons of rock, hundreds of millions of seeds are protected in their mountain fortress. Frozen in such conditions inside the mountain, seeds of most major crops will remain viable for hundreds of years, or longer. Seeds of some are capable of retaining （保留） their ability to grow for thousands of years.
Everyone can look back now and say that the Seed Vault was a good and obvious idea, and that of course the Norwegian government should have approved and funded it. But back in 2004, when the Seed Vault was proposed, it was viewed as a crazy，impractical, and expensive idea.
We knew that nothing would provide a definite guarantee. But we were tired，fed up，and frankly scared of the steady, greater losses of crop diversity. The Seed Vault was built by optimists who wanted to do something to preserve options so that humanity and its crops might be better prepared for change. If it simply resupplied seed gene banks with samples those gene banks had lost, this would repay our efforts.
The Seed Vault is about hope and commitrnent - about what can be done if countries come together and work cooperatively to accomplish something significant，long-lasting，and worthy of who we are and wish to be.
1.According to the passage, the Seed Vault is ___________.
A. a tunnel where the collected seeds are displayed
B. a stone room that contains the seeds of endangered crops
C. a seed gene bank that stores diverse seeds for future agriculture
D. a lab where researchers study how to maintain the diversity of crops
2.The underlined word“viable”in Paragraph 3 probably means ________.
A. mature B. clean
C. alive D. valuable
3.Paragraph 3 mainly tells us __________.
A. how the seeds are preserved B. where people keep the seeds
C. why the seeds are protected D. what people do to study the seeds
4.We can know from the passage that _________.
A. the Seed Vault offers a solution to climate change
B. most countries took part in rescuing the seed varieties
C. the Seed Vault guarantees to prevent the loss of crop diversity
D. many people originally considered building the Seed Vault unwise
难度: 困难查看答案及解析
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在未给提示词的空白处仅填写1个适当的单词，在给出提示词的空白处用括号内用给词的正确形式填空。
The day that I met my best friend for the first time, I was full of 1. （anxious）. I was trying to do some revision for an important oral exam in the local library and people 2. （keep）disturbing me. I was getting more and more annoyed and of course，the more upset I got，the less I was able to concentrate. The last straw was when I heard someone 3.（sing） behind me. The singing was so loud that I could even recognise the song! I turned around and glared at the person 4. was singing. It was a tall girl about the same age as me and she had a big smile 5. her face. She was standing with a book in her hands near the“English Literature”section. She looked like a literary type and seemed very interested in 6. she was reading. I glanced at 7. book's cover. It was a book of Tennyson's 8.（poem）.
The fact that she looked like a sensitive，friendly girl didn't matter. If anything，it made me even angrier. “How could she be so selfish?”I thought 9. （angry）. In fact，I was surprised there wasn't steam 10. （come） out of my ears!
难度: 困难查看答案及解析
