Recently some American scientists have given a useful piece of advice to people in industrialized nations．They say people should eat more of the same kind of food eaten by humans living more than 10,000 years ago． {#blank#}1{#/blank#}

    The scientists say that the human life has changed greatly．Our bodies have not been able to deal with these changes in lifestyle and this had led to new kinds of sicknesses． {#blank#}2{#/blank#} So they are called “diseases of civilization”．Many cancers and diseases of the blood system are examples of such diseases.

    Scientists noted that people in both the Old Stone Age and the New Stone Age enjoyed very little alcohol or tobacco, probably none． {#blank#}3{#/blank#} However, a change in food is one of the main differences between life in ancient times and that of today.

    Stone Age people hunted wild animals for their meat, which had much less fat than domestic ones．They ate a lot of fresh wild vegetables and fruits．They did not have milk or any other dairy products, and they made very little use of grains． {#blank#}4{#/blank#} We eat six times more salt than our ancestors．We eat more sugar．We eat twice as much fat but only one third as much protein and much less vitamin C.

    {#blank#}5{#/blank#} But scientists say that we would be much healthier if we eat much the same way the ancient people did, cutting the amount of fatty, salty and sweet food.

A．Stone Age people lived a simple life.

B．But today, we enjoy eating a lot of these.

C．In that case, they would live much healthier.

D．Ancient people also got lots of physical exercise.

E．These new sicknesses were not known in ancient times.

F．People today probably don't want to live like our ancestors.

G．Modern people used to suffer from “diseases of civilization”.

    For the rest of March,a disease will sweep across the US.It will keep kids home from school. {#blank#}1{#/blank#} Employees will suddenly lose their ability to concentrate.

    The disease, known as “March Madness”, refers to the yearly 65－team US men's college basketball tournament (锦标赛). {#blank#}2{#/blank#} Teams compete against each other in a single－elimination (单局淘汰) tournament that eventually crowns a national champion.

    Nearly 20 million Americans will find themselves prisoners of basketball festival madness. The fun comes partly from guessing the winners for every game. Friends compete against friends. {#blank#}3{#/blank#}  Colleagues against bosses.

    Big－name schools are usually favored to advance into the tournament.But each year there are dark horses from little－known universities.

    This adds to the madness.Watching a team from a school with 3,000 students beat a team from a school with 30,000,for many Americans,is an exciting experience.Two years ago,the little－known George Mason University was one of the final four teams. {#blank#}4{#/blank#}

    College basketball players are not paid, so the game is more about making a name for their university and themselves. {#blank#}5{#/blank#} About $4 billion will be spent gambling (赌) on the event.According to Media Life magazine,the event will bring in $ 500 million in advertising income this year,topping the post －season income of every US professional league,including that of the NBA.

A. Husbands against wives.

B.The players will go all out for the games.

C.But that doesn't mean money isn't involved.

D.College students will ignore piles of homework.

E.People are willing to spend more money on watching it.

F.It begins on March 15 and lasts through the beginning of April.

G.Many people had never even heard of the university before the tournament.

    Social media is our new travel agent, and it's changing the places we go. In some cases, the places we go. In some cases, the newfound fame brought about by social media platforms has helped to boost local economies and bring tourists to places they might never have discovered otherwise. In other cases, it's creating problems for countries and cities that are simply not equipped to deal with the influx(涌入) of tourists. Check out two of the incredible locations around the world that have gone viral on social media.

    Iceland

    This northern island nation has seen a dramatic surge(激增) in visitors over the past few years. One reason for that is the so-called "Game of Thrones effect,". This, combined with the availability of cheap flights and some very effective marketing campaigns, has made Iceland a popular travel destination. The number of tourists almost doubled from 566,000 to over 1 million between 2011 and 2015, according to Iceland's tourism board.

    While this influx of visitors has brought a much-needed boost to the economy post-recession(经济衰退), it's also pushed up prices for residents and put pressure on the infrastructure. Locals complain of tourists destroying the fragile ecosystem and leaving a mess behind them as they trample over the formerly untouched natural sites.

    Cuba

    According to Cuba's ministry of tourism, four million visitors went to Cuba in 2016, an increase of 13 percent from the year before. The tourism boom has had some consequences for the country's residents, The New York Times reported in December 2016.

    The surge in visitors has led to a food shortage, and basic food items have become completely unaffordable for locals. Local hotels and restaurants are buying up supplies in bulk for guests, pushing up prices and leaving limited amounts for locals.

    The situation has been acknowledged by the Cuban government, who put caps on prices to make them more affordable for residents. This has only encouraged sellers to put products on the black market, according to The New York Times.

    If you are planning to organize a summer camp, you need to have a good plan of action. Children look forward to attending-summer camps. They want to learn new things, and make new friends. So, your summer camp planning decides whether the kids are going to enjoy it or not.{#blank#}1{#/blank#}

    Summer Camp Themes

    When you plan a summer Camp, you ought to have a theme. For example, you can have a swimming summer camp.{#blank#}2{#/blank#}An art camp would have a theme like “paint the world”, and so on.

    Summer Camp Games

    If the summer camp is going to be an overnight program, then you have to prepare all kinds of activities for kids.{#blank#}3{#/blank#}Games act as one of the best and simple relaxing skills for kids. They also help kids get along with each other and develop the ability to work in a team.

    Adventure Sports (冒险运动)

    The most interesting part of a summer camp is adventure sports! Plan for sports like rock-climbing, river-crossing, etc.{#blank#}4{#/blank#}However, words giving kids encouragement are always welcome.

    A Special Day

    {#blank#}5{#/blank#}You can have a party or something like that. You can also have a cultural day or a talent day when the children get to exhibit their culture or tradition they belong to, and at the same time, get to know about other cultures, too.

    Just head on and carry out all the above things. Make it the most fun and interesting camp ever, so that you have them coming back to you each time you plan for a summer camp in the future!

A. So plan interesting and fun games.

B. Your summer camp program can have a special day.

C. Here the kids interested in swimming would join your camp.

D. A kid could feel bad if he / she is not doing well at the camp.

E. Kids on the summer camp need to be on their own sometimes.

F. This article will help you make the camp more interesting and fun.

G. Make sure you do not force a kid to take part in an activity he / she is scared of.

    The ability to stay positive is one of the most important skills for us. Why is this? The reason is that we will spend most of our lives setting and trying to achieve goals. Everyone has dreams. Everyone wants to know deep down inside that they were put here to do something great. {#blank#}1{#/blank#} The second you set a goal, difficulties will begin to appear to stand in your way. Most people let these challenges rob them of the life they really want.

    If you want to achieve greatness, if you want to experience the best life possible, then be prepared to get knocked down over and over. {#blank#}2{#/blank#} This explains why there are so many people who have stopped trying to reach their dreams.

    So how do you remain positive regardless of what type of challenge you are facing? It all comes down to how you choose to respond to any situation as well as what you decide to focus on. No matter how bad your situation is, you can always find something good in it.{#blank#}3{#/blank#}

    If you keep focusing on how bad you have it, how are things supposed to get any better? {#blank#}4{#/blank#}Of course it is. If this is true, why even bother thinking positively? That is because if you do, you have a chance to make things better. If you don't, things will usually get a lot worse.

    Realize that challenges are a part of life.{#blank#}5{#/blank#} It's what makes reaching a goal worth it. If you were able to get everything you wanted without even trying, the victory wouldn't taste as sweet.

A.Everyone will have to go through them.

B.Staying positive can be beneficial in many ways.

C.Staying positive during situations like this is not easy.

D.You can do things like reading positive books or listening to positive songs.

E.Is it possible to be positive and still have your circumstances get even worse?

F.However, the problem is that life is tough.

G.So what you can do is start focusing on what is good.

    The Internet has completely changed the workplace over the past three decades. Artificial Intelligence is now all set to do the same, and businesses that don't take advantage of the technology risk being left behind.

    Global tech giants (巨头) like Amazon have been leading the change, and businesses of all sizes are now using the technology for employing and managing their staff.

    Among them is L'Oreal. With about a million applicants for roughly 15,000 new positions each year, the company is using AI to hire.

    “We really wanted to save time and focus more on quality, diversity and candidate experience. And AI solutions were the best way to go faster on these challenges, said Eva Azoulay, global vice-president of L'Oreal's Human Resources Department.

    The company uses Mya, a chatbot, to save employers' time during the first stage of the process. It handles routine questions from candidates, and checks details such as availability and visa requirements. Should candidates make it to the next round, they'll run into Seedlink, an AI software that scores applicants based on their answers to open-ended interview questions. These scores don't replace human judgment, said Azoulay, but they do pick out candidates who might not seem like obvious choices.

    Early results have been promising. For one internship program, where 12,000 people apply for about 80 spots, employers claim they saved 200 hours of time while hiring the most diverse group to date.

    Other businesses have gone beyond employment and are using AI to help manage employees. Some UK firms have started using Isaak, a system designed by the London-based company StatusToday, to track how many hours staff spend online and the number of emails they receive. London real estate agent JBrown has been using this system since March. CEO James Brown said it helps the firm understand employees' habits and prevent them from overworking. "It enables us to solve bottleneck problems and relieve overburdened employees," he said.

    Despite these examples of good practice, there is still a long way for AI to reach its full potential (潜力), and the technology comes with risks. Another AI danger could be its impact on jobs through automation (自动化). McKinsey predicts AI could add $13 trillion to the global economy by 2030, with early adopters doubling their cash flow over that period. But the demand for repetitive (重复的) or digitally-unskilled jobs could drop by around 10%, the consulting firm said in a 2018 report.