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Do you like to keep fit? We're always told that regular exercise is good for our body and mind. More and more people are taking up activities that improve their fitness. But is there a risk that some of us might get obsessed (着迷的) and overdo it?

Well, for some people, fitness has become an obsession as they aim for perfection. And fitness trackers and apps can add to this addiction, especially if someone is driven by achievement and perfectionism. And sharing data on social media means exercising becomes public and competitive, which could cause problems in someone who is vulnerable (脆弱的). Experts say this can lead to a medical condition called orthorexia nervosa, or addiction to healthy eating and over-exercise. Untreated, it can lead to malnutrition and mental health problems. 

Too much exercise can also take its toll on someone's physical health as well. Symptoms of over-exercising include injuries such as a broken leg and a low immune system. So how much exercise is too much? Researches found the ideal pace to jog was about eight kilometers per hour-and that it was best to jog no more than three times a week or for 2.5 hours in total, showing that moderate jogging is possibly more beneficial than being inactive or undertaking strenuous (剧烈的) jogging.

If you're more of a couch potato than a runner, this might sound like good news. But for amateur (业余的) athletes who can't help but push their bodies to the limit, the advice from Martin Turner, a sports and exercise psychologist, is, "It's all about letting go, not being obsessed, learning not to control everything, saying, ‘You don't need to be perfect. '"

The aim of students who came to school is to study. But to study requires a right way, or you waste either the time or the money. The following are the ways of studying. 

The best time for reading is morning, because in the morning, the air is fresh and the mind is clear. For that reason, we can get good results. 

In studying we must have patience. If we have not known a text well, we must read it again. We should not read the next one till we have learned the first one. 

When we are studying, we must put our hearts into the book, or we can get nothing from the book while we are reading. 

We must always ask "whys". If it is not well understood, write it down and ask our teachers or our parents, or friends. In any possible way, we must know it completely and what we've learned can be used well and made better.

Though there are many ways for studying, yet the above mentioned will be quite enough if we can keep them in heart and do so. 

My new teacher is cool. Her name is Paula so we call her Miss Paula. 

The first time we met her she said we are going to be good friends and that good friends are always nice to each other. 

Miss Paula has been teaching us a lot of things. Some of us used to get in trouble for talking in the hallway (过道). Miss Paula says she can't change the rule that we can't make noise in the hallway but we can still talk to each other. She is teaching us sign language. I already know how to say "hello" and "how are you" with my hands. Now we love it when we have to walk somewhere and we are always quiet except for a laugh or two.

Miss Paula likes everybody even Sam and nobody likes Sam. He never does what he's told but now he is doing better. Miss Paula says every single one of us is perfect and beautiful just the way we are. I guess that includes Sam.

This week at school was really the best ever. I didn't even get in trouble when I thought I would because I spilled (洒) milk on my homework and had to hand it in when it was still wet. Miss Paula just smiled and asked "What's this?" So I told her what happened. Miss Paula put it near the window to make it dry. She said the sun had been waiting for such an important job as this and would be happy to help us.

Well I have to go and get ready for bed now. I have school in the morning and I want to wake up early so I will have time to pick Miss Paula some flowers. 

Low-cost Gifts for Mother's Day

Gift No. 1

Offer to be your mother's health friend. Promise to be there for all doctor's visits whether she has a disease or needs a regular medical check-up. Most mothers always say there is no need, but another set of eyes and ears is always a good idea at a doctor's visit. The best part? This one is free.

Gift No. 2

Help your mother organize all of her medical records, which include the test results and medical information. Put them all in one place. Be sure to make a list of all of her medicines and what time she takes them. "Having all this information in one place could end up saving your mother's life," Dr. Marie Savard said.

Gift No. 3

Enough sleep is connected with general health conditions. "Buy your mother cotton sheets and comfortable pillows to encourage better sleep," Savard said. "We know that good sleep is very important to our health. "

Gift No. 4

Some gift companies such as Presents for Purpose allow you to pay it forward this Mother's Day by picking gifts, 10 percent of whose price you pay goes to a charity (慈善机构). Gift givers can choose from a wide variety of useful but inexpensive things — many of which are "green" — and then choose a meaningful charity from a list. When your mother gets the gift she will be told that she has helped the chosen charity.

I am Denise Clarice,the only one in my class who does not have a pet.No dog waits for me at the bus stop.No cat sits beside me while I read.But I don't feel sorry.Why?

The rule about no pets at our house is not because my parents are mean.Mom and Dad are very nice,and I know they like dogs because they always stop to pet Maurice,the dog who lives next door.

The rule is not because I am too young to have pets,because I am 11 years old.Besides,I am very responsible.I always return library books on time and I do my homework every day,even when I would rather play in the grass.The rule about no pets is because of Kevin.He is my little brother and he has allergies(过敏) . Pets make him sneeze(打喷嚏).

One day when I was walking home from school,feeling sad because there is no dog waiting at home for me,I heard a soft little sound from behind a tree.I stopped and listened.There it was.I heard the sound again.

I walked quietly up.A tiny ball of gray fur looked up at me and said,"Meow."Before I knew it,I was holding the cat.Again,before I knew it,I was walking toward home,holding the cat in my arms.She must be lost.Finders keepers,I told myself.

Arriving home,I took the cat directly to my room.We played with a ball,and she jumped high to catch the ball.I made a comfortable litle bed for her in a box with an old towel(毛巾)and gave her milk to drink.Then my mother called me to dinner.

注意：1.所续写短文的词数应为150左右；2.续写部分分为两段, 每段的开头语已为你写好；3.请按如下格式在答题卡的相应位置作答。

I ate fast so I could go back to my room to play with the cat

Hearing my explanation,my dad asked me to take the cat to the house with a tree in front.

假定你是李华，你的英国笔友 Adams 因为没有按时完成作业受到老师的批评。他写信 向你征求建议。请你给他写一封回信，内容包括：1.表示安慰；2.提出建议。

注意：1.写作词数应为80个左右；2.请按如下格式在答题卡的相应位置作答。

Dear Adams,

Yours sincerely,

Li Hua

It is said that a course(offer) at a university in East China will link students' weight loss(direct) to their marks in order to limit obesity(肥胖).

The course from Zhou Quanfu, a teacher at Nanjing Agricultural University in Jiangsu Province, aims(encourage) overweight students to control their diets and increase their exercise. Zhou said 60percent of a student's grade will(determine) by their weight loss. If they manage to reduce 7 percent of their(origin) weight, they can pass the course.

One student is unwilling to give her real name said that the students run on treadmills(跑步机) in the school's fitness room and walk10 kilometers every Monday and Friday evening." We use mobile apps to record daily food intake," added the student. Before(eat),they send photos of their food via a mobile app for (suggest) from nutritionists. " Only studentsmore than 30

percent body fat or a body mass index(指数) of 28 or higher can sign up for the course,"said Zhou.

Physical fitness test data showed that between 2013 and 2014 around 13 percent of the students in Zhou's university were obese. He hopes the course will help them lose weight and have more confidence in(they)day by day.

This is the dream of my running partner:Eduardo.He's a marathon runner with an eye problem who needs1  to train and to compete.

Eduardo has been running longer than me,and has more desire than any person I know.________        2 ,he didn't like training for a marathon.He ran with3 without a clear goal,got bored with training and didn't train with many people.

Now it has4 —he has an 18-week training plan where he runs six days a week,and he has realized he5 running more because he has a6 —to make a little progress every day.He runs with me,one who loves running so much and with the training group at La Tapia de Madrid.The7 we share for running is what8 us.

Eduardo and I run together by a rope—I have to9 turns,different terrain(地形) and barriers.It's10 but I have never11 this in the presence of others.The main thing we12 is to run confidently and enjoy running as a whole.

Now,Eduardo goes running with different people,but with a fixed goal of rhythm(节奏)and 13 .He has taken five weeks of training,but he says he will keep on doing it,because he has understood14 can be the way to improve his fitness.

Eduardo wants to run sub-3:30 in the Madrid Marathon,and he will do it.15 ,it's not written in stone,but I'm confident that he's going to succeed.

Wanting to spend some time camping this summer?But you're afraid it's going to be a disaster?You needn't worry. With a little preparation and a little help from a camp planner,you can have the camping experience of your dreams.

Discuss Camping with Your Children

A little preparation goes a long way.If your children have never camped,they may be  scared or resistant to the idea.Talk with them about what camping will be like and what they will experience.Highlight the fun things but don't avoid things that they may be afraid of or unsure about. 

Pack in-Case-of-Rain Activities

No one likes rain when they are trying to enjoy the outdoors,but sometimes even if you check your local forecast,rain happens. ,like playing cards and a chess set to wait out the rain. Rainy afternoons are also a perfect time for naps and storytelling.Some favorite family memories can be made waiting for the rain to pass.

Pack Special Snacks

.Cookies and roasted marshmallows are some good foods and you can find some more fun treats to share on your camping adventure like walking tacos and campfire chili.Camp food can become long-lasting traditions in your family.

Use a Camping Planner

Let's face it-planning a camping trip can be a lot..You can use a camping planner to help you get organized and make sure you have a truly memorable camping experience.The Camping Planner includes a comprehensive packing checklist,a camp meal planner and grocery shopping lists,along with lists of your favorite camping spots and places to try in the future and so much more.

A.But you don't have to do it all alone

B.Make sure you pack necessary things

C.Here are some of our favorite natural games

D.Camping without special snacks is not perfect

E.Open the conversations and answer them honestly

F.An interesting trip unnecessarily means an easy one

G.Camping can be a wonderful experience for your family

Say" Sit" to your dog, and he'll likely sit on the floor. But would he respond correctly if the word were spoken by a stranger, or someone with a thick accent? A new study shows he will, suggesting dogs understand spoken words in a clever and complicated way long thought unique to humans.

Holly Root-Gutteridge, a biologist, and her colleagues ran a test. The researchers filmed 42 dogs of different breeds as they sat with their owners near an audio speaker that played noncommand words with similar sounds, such as "had", "hid", and "who'd". The words were spoken—not by the dog's owner—but by several strangers, men and women of different ages and with different accents.

In the video above, the dog Max turns quickly and listens seriously when he hears a woman say "had"for the first time. But as other women with different accents repeat the word, he loses interest, indicating he knows they are all saying the same word. When a speaker says a new word, like "who'd", Max cheers up again, but his attention flags when a new voice returns to saying "had". Together, these reactions suggest dogs recognize words regardless of the speaker—and that they don't need any training to do it, the team reports today in Biology Letters.

"It's wonderful—and novel—to see research looking at dogs'reactions to words that are not commands or requests," says Alexandra Horowitz, a researcher at Barnard College in New York City. Because of the nature of the test, however, the scientists cannot show that the dogs "understood"what the words meant, Horowitz points out." But the work clearly demonstrates that dogs are listening to us,"she says, even when our speech is not about them.

If you were a superhero, what would your super power be? Would you want to fly or be invisible? Or, perhaps, you'd rather have the power to read minds? Wouldn't that be cool?

Reading minds is not as far-fetched as you might think. In fact, researchers at the Massachusetts Institute of Technology have developed a wearable device that can actually express a person's thoughts and allow them to talk to a computer―without anyone else hearing.

The device, called AlterEgo, allows a person to control a computer and ask it questions without ever saying one word. When a person wearing the device thinks of a word or a phrase but does not speak it, AlterEgo picks up the neuromuscular (神经肌肉的) signals in the person's jaw and face.AlterEgo sends those signals to a computer, which is programmed toassociate them with specific words.

The device is fairly accurate. In a 10-person trial, AlterEgo had the 92percent transcription (转录) accuracy. Researchers say that number will increase over time. "Our idea was: Could we have a computing platform that's more internal, that combines humans and machines in some ways and that feels like an internal extension of our own thought? "Arnav Kapur, a graduate student at the MIT Media Lab said.

So what effect could this have on communication? AlterEgo can changethe way humans communicate with computers, allowing us to silently connect with AI assistants such as Amazon's Alexa or Apple's Siri without anyone knowing. If a person is having a conversation and wants to look up a bit of information, they don't have to take out their computer or mobile phone; instead they can just think of the question. AlterEgo will answer without breaking in on the conversation. The device can also help people communicate with their voice in noisy situations, such as on a factory floor oron the deck of an aircraft carrier.

When four young children were found after 40 days in the Colombian Amazon forest,the rescuers noticed that the oldest,13-year-old Lesly Mucutuy,had some seeds hidden between her teeth.

The seeds were from a native Amazon palm tree known as"milpeso"sin Colombia.Its fruits are rich in fat and Amazon tribes use them to make a vegetable oil."She was keeping them so that the warmth of her mouth would open up the seeds and she could feed the pulp( 果 肉 ) to her younger sisters and brothers,"said Eliecer Muioz,one of the four guards who made the very first contact with the children."That's how they stayed alive".

Survival experts have been trying to answer this question:How did the four children—the youngest just a baby—survive in the heart of the Amazon rainforest for so long?The stretch of the jungle they were found in is one of the most remote and difficult to reach in Colombia,where wild animals and poisonous insects are plentiful,rains can pour for over 15 hours a day and visibility is sometimes limited to 10 meters due to the thick vegetation.In more than a month without adults, they appear to have survived on wild fruits and three pounds of cassava flour, a high-protein traditional food of the Amazon diet,which they got from the wreckage(残骸)of the plane.When found,the children had bottles they used to collect water,either from streams or from the rain.

While their survival remains a marvel,it was no doubt facilitated by traditional knowledge of  the forest they acquired from a remarkably young age.Lesly,in particular,is praised for not only staying alive herself,but also making sure her younger sisters and brothers would survive following the loss of their mother in the plane crash.

Nelly Kuiru,an activist,believes that her courage goes far beyond botanical skills: "Ancestral, traditional knowledge is more than that Lesly learnt to pick fruits, but there's something much deeper there,a spiritual connection with the forest surrounding us."

Visit to the Vatican Museums and Sistine Chapel

Vatican City is not only the smallest country in the world,but also a treasure house of art and history.You can admire the impressive fresco paintings(壁画)of the Sistine Chapel,and explore the Vatican Museums,which house a big collection of masterpieces from ancient to modern times.

Skip-the-line tickets:

The best-selling tickets for access to the Vatican Museums and Sistine Chapel.Skip(跳过)

the line tickets with priority access.

Reduced tickets:

Reduced tickets are available to children from 6 to 18 years of age,as well as students between the ages of 18 and 25.It is necessary to present a formal document at the university for the current year.There are no reductions for the over 65s.

Free entry:

Admission is free for children under 6 years of age.It is also free for disabled visitors and their carers.As it is not possible to book in advance,they will have to go directly to the"Special Permits"and /or"Reception"counters located in the entrance hall of the Vatican Museums.

Visit to the Vatican Museums and Sistine Chapel with audio guide