Imagine looking out of your window and seeing a whale swim by. That's the sight that surprises New York City residents recently. In the past years, humpback whales have been spotted in the two rivers surrounding the island of Manhattan, the Hudson River and the East River, {#blank#}1{#/blank#}

    Experts say that river cleanup efforts have improved water quality and led to an increase in the number of fish there. Fish are on the humpback's menu.{#blank#}2{#/blank#}The sighting is also an encouraging sign that conservation efforts are helping humpback whales come back. In 1973, the species was listed as the endangered. Now scientists say humpback whales are making a comeback.

    By the middle of the 20^th century, hunting whales for profit had nearly wiped out many whale species. In 1973, the U.S. set up the Endangered Species Act. People were no longer allowed to hunt them in the U.S. waters. In 1982, the International Whaling is illegal worldwide.{#blank#}3{#/blank#} Last September, it was announced that nine groups of humpback whales are no longer endangered. Four groups are still endangered and a fifth is threatened.

    {#blank#}4{#/blank#} The number of them is growing particularly faster in the Southern Hemisphere like Tasman Sea and Coral Sea. And the number of humpback whales in Hawaii has made an amazing recovery. In 1966, there were fewer than 1,500 humpbacks there. Today there are about 10,000. But humpbacks in other parts of the world are still struggling.

    {#blank#}5{#/blank#}“We still have a lot of work to do,” says Angela Somma, head of NOAAS Fisheries' endangered species division. "But with the right protection, the number of humpback whales should continue to grow.

A. These efforts to save whales are paying off.

B. People are frightened when seeing whales in the river.

C. Last year, one even swam past where the mayor lives.

D. Today there are about 100,000 humpback whales worldwide.

E. The extra food in the rivers is mainly what's attracting the whales.

F. Scientists have carried out further research on the number of the whales.

G. Scientists say that the focus needs to be on the whales that are still struggling.

    Having a roommate can be one of the best experiences in college or, easily, one of the worst.{#blank#}1{#/blank#}Follow these tips to avoid the common mistakes that turn good roommate relations bad.

Talk things out.

    Communication is key. If something happens, sit down with your roommate and have a face-to-face conversation. I've seen roommate relations fall apart because something happens and, instead of talking to each other, the two start complaining about their roommates behind their backs.{#blank#}2{#/blank#}

    Don't expect to be best friends.

    Some roommates become the best of friends, and some don't. Don't put pressure (压力) on yourself or your roommate, especially when you first meet.{#blank#}3{#/blank#} And if your roommate doesn't end up being your best friend, don't worry.

    Ask before you take.

    This applies (适用) to food, clothes and anything else. If you want to keep a relation going, show your roommate that you have respect for what is his or hers by asking first.{#blank#}4{#/blank#} Clean up.

    This should do without saying. Don't be lazy. Or, at least, don't bury your roommate in your clothes and garbage.{#blank#}5{#/blank#} But being considerate with where you put your things will help you avoid conflict.

A. This creates nothing but terrible situations and unhappiness.

B. Even if you both agree to share everything, you should still ask.

C. So you need to think twice before you help your roommates out.

D. Sometime you get stuck with someone who has tons of bad energy.

E. You don't have all the time to clean your room and keep it organized.

F. It all starts with you to have a good relation with your roommate.

G. Remember, you're trying to make a new friend, not to frighten your roommate away.

    In 2017, AlphaGo defeated Chinese player Ke Jie to become the world's No 1, ending thousands of years of human dominance（控制）in the game. AlphaGo is an artificial intelligence（AI）Go-playing program{#blank#}1{#/blank#}

    Artificial intelligence（AI）is usually defined as the science of marking computers do things that require intelligence when done by humans.{#blank#}2{#/blank#}These include learning, reasoning, problem-solving, perception, and language-understanding.

    {#blank#}3{#/blank#}In fact we are increasingly depending. upon computer-based artificial intelligence. As Charlie Qrtiz said, head of AL at the Massachusetts-based software company Nuance Communication, “It has opened a window for us.”Smartphones, self-driving cars, intelligent robots，etc. are constantly coming into our life. According to a recent survey, half of the world's AI experts believe human level machine intelligence will be achieved by 2040. This will open up huge possibilities for the enrichment of mankind, from tackling climate change and treating disease to labour- saving devices.

    {#blank#}4{#/blank#}Physicist Stephen Hawking last year warned that unless we take care, board games might be the least of it. “The development of full artificial intelligence could mean the end of the human race.”{#blank#}5{#/blank#}They believe AlphaGo's victory is a reminder of how fast the world is overcoming the obstacles in the way of AI, and its distribution in the world about us. Although there may yet be no evidence that computers will ever shake off their human masters, we should still treat these development with the humility and caution they deserve.

A. Other scientists have also expressed the concern.

B. Artificial intelligence has both advantages and disadvantages.

C. Defeating a human Go master is not the only thing AI can do.

D. Artificial intelligence will bring us disasters instead of benefits.

E. It was designed by an American Artificial intelligence company.

F. Not all experts hold the optimistic attitudes to the development of AI.

G. Research in AI has so far focused on some special fields of intelligence.

Study abroad

    Every year, thousands of students choose to study abroad for the summer, six months, a year or longer. Here are some things you need to know before you make such a decision.

Why do it?

    Living in another country will help you learn about the culture of another land. You will see the world in a new way. {#blank#}1{#/blank#} Many companies today want employees who speak a second language or who have experienced living or working in another country.  

Making the right choice.

    To choose the right country or school,  ask yourself these questions:  {#blank#}2{#/blank#} Do I want to live with a host family (寄宿家庭),  with roommates,  or alone?  How much do I want to pay?  

    {#blank#}3{#/blank#}

    Get your passport and visa (签证) early!  Before you go, learn as much of the language as you can, and read about the customs of your host country. Also, talk with people who have experienced studying abroad. Call the school to make sure someone can meet you when you get there.

    Once you are there.

    After the first few weeks it's usual to feel a little homesick. {#blank#}4{#/blank#}Just be open to meeting new people and having new experiences. Remember that it takes time to get used to a new place with new customs. Talk to your new friends and write about your feelings. {#blank#}5{#/blank#}

    Running is a great way to get in shape and just about everyone can do it. Given that it's so easy to take up the sport, a lot of beginners jump right into running without actually knowing what it takes to establish a healthy routine.{#blank#}1{#/blank#}. If you are just starting out, avoid the following things to help you increase your chances of running success.

    Doing too much too soon

    One of the biggest mistakes beginners make is doing too much too soon. Picking up a new hobby like running is no doubt exciting. Runners need to ease into the sport before increasing the distance.{#blank#}2{#/blank#}.

    {#blank#}3{#/blank#}.

    Beginners might think they need to run nearly every day to meet their fitness or weight-loss goals, but this couldn't be further from the truth. {#blank#}4{#/blank#}, especially for beginners whose muscles and bones haven't  yet been conditioned for such intense (剧烈的) exercise. So it's important to give your body ample rest between workouts. Follow a training plan that includes rest days.

    Comparing yourself to others

    {#blank#}5{#/blank#}. You're excited about running, so you are probably reading running blogs, magazines and message boards where you might start to feel inadequate about your own running pace. Instead of getting down on yourself, remember that every runner was once a beginner and use their success as motivation!

A. Not taking rest days

B. Not running every day

C. As mentioned, a healthy routine is what they attach importance to

D. Running is a demanding activity which can be really hard on your body

E. When starting out with running, it's tough not to compare yourself to others

F. It will help reduce the risk of injury, so you can continue with your new running routine

G. Many make a number of common mistakes, which can interfere (干扰) with training or lead to injury

    How do parents teach children about money？How do you teach them to get rich？Likely, you do not have an answer because you would not call yourself rich. {#blank#}1{#/blank#}Here is what self-made millionaires tell their kids about wealth.

    You deserve to have wealth.

    This statement could be read as arrogant（傲慢的）,when in fact it comes from a place of humbleness. Self-made millionaires teach their children that they deserve to be rich not because they were born into the right family but because they work hard to solve other people's problems.{#blank#}2{#/blank#}

    {#blank#}3{#/blank#}

    Having money gets rid of tons of the issues which people find themselves in when they do not have it. Not happy with your current living situation？You can pack up and leave. Do you hate your job？Why not start your own business. Upset about a global disaster？Donate what you can to the cause. Money allows you to enjoy life on your own terms.

    Nothing is guaranteed.

    {#blank#}4{#/blank#}They must create their own lives and futures. It's important to teach kids about self-reliance. Legally, kids have the right to have more and more things, but it's important to teach against these values.

    Solve problems to earn your wealth.

    In a free market economy, everyone is looking for a way to make money. If you come up with an idea to solve the world's problem, there will be a demand for it. The bigger the problem the more difficulty you might have getting it off the ground.{#blank#}5{#/blank#}Pairing your skills with problem solving could be the way towards wealth.

A. A big lesson self-made millionaires teach their kids is that the world owes them nothing.

B. Having wealth allows you to do something for others to earn your place.

C. When do you start teaching your children about money?

D. How do the rich approach this question?

E. But it could also make you very rich.

F. Even the blind can see money.

G. Wealth leads to freedom.