Tigers are very strong and scary. We may see tigers in Europe, Asia and America in the mountains. The tigers live far away from {#blank#}1{#/blank#} houses. They eat birds, hares (野兔) and other small {#blank#}2{#/blank#}. In the day they hide in the dens (巢穴), and at night they go out {#blank#}3{#/blank#} food.

    In {#blank#}4{#/blank#} when tigers are hungry, they will become very {#blank#}5{#/blank#} But now, people cut down many {#blank#}6{#/blank#}, so tigers are losing their homes. Also, some people kill tigers to get {#blank#}7{#/blank#} fur. Some people even buy things made {#blank#}8{#/blank#} tiger bones (虎骨). So the number of tigers {#blank#}9{#/blank#} getting smaller and smaller.

    Animals are our {#blank#}10{#/blank#} friends. In order to protect them, we must build many natural reserves. And we must stop people from hunting.

Green is an important color in nature. It is the color of grass and the leaves on trees. It is the color of most growing plants, too.

Sometimes, the word green means young, fresh and growing. Sometimes, it describes something that is not yet finished or plants that are not ripe.

For example, a greenhorn is someone who has no experience, who is new to a situation. In the fifteenth century, a greenhorn was a young cow or ox whose horns had not yet developed. A century or so later, a greenhorn was a soldier who had not yet had any experience in war (战争) .By the eighteenth century, a greenhorn had the meaning it has today——a person who is new in a job.

About one hundred years ago, greenhorn was a popular expression in the American west Old—timers used it to describe a man who had just arrived from one of the big cities in the east. The greenhorn didn't have the skills that he would need to live in the hard, rough country.

Someone who has the ability to grow plants well is said to have a green thumb. The expression comes from the early nineteen hundred.

A person with a green thumb seems to have a magic touch that makes plants grow quickly and well. You might say that the woman next door has a green thumb if her garden continues to grow long after your plants have died.

The Green Revolution (革命) is the name which was given some years ago to the development of new kinds of rice and other grains. The new plants produced much larger crops. The Green Revolution was the result of hard work by agricultural (农业的) scientists who had green thumbs.

    Grandparents are respected in many human societies. But telling stories about old times and overfeeding grandchildren seem like human qualities. Are these classic grandparent behaviors really limited to humans?

Do any animals know their grandparents the way people do?

For most species on Earth, the answer is certainly " No" . " Usually, there aren't grandparents around anymore when an animal is born,"  said Mirkka Lahdenpera, a biologist at the University of Turku in Finland. " Even if an animal's life span does overlap (重叠) with its grandparents', most species spread out to avoid competing for resources, so the chance of running into a grandparent is slim." 

But there are a few clear exceptions, primarily among mammals (哺乳动物) that live in close social groups. In troops of langur monkeys in India, older females lived together with their daughters and grandchildren. The grandmother langurs defend the group's babies against attacks and even give their own grandchildren special treatment.

Many whale species, too, travel in family groups that include both grandmothers and grandchildren.

Elephant herds are also famously matriarchal. They are led by a grandmother, who can live to around 80 years old, and are generally made up of her daughters and their young. The females in a herd form close bonds and work together to raise their young.

Lahdenper found that the babies of young mothers were eight times more likely to survive if their grandmothers lived near them than if they didn't. When the young mothers were older and more experienced at raising babies, this beneficial grandmother effect disappeared even if the actual grandmothers were still around.

Indeed, most evidence for the benefits of grand parenting comes from mammals. But in 2010, researchers found that in troops of insects called gall-forming aphids, older females defend their relatives after they've stopped reproducing (繁殖).

And what about grandfathers? Studies of humans in recent decades have shown that a living grandfather can improve a person's mental health and other indicators of well-being. But there's no evidence of that in the animal kingdom. Male animals rarely socialize with their own children, let alone any grandchildren.

How do you feel when a teacher says it's time for a test? Do you get worried about it? Look at the next test skills （技巧）!

☆Go to class on time and do your homework carefully.

In this way, you will learn the lessons, such as Chinese, English, maths, and so on. You won't have so many worries.

☆Relax and go to bed on time.

After you finish your lessons in the afternoon, you need to relax in the evening and sleep well at night.

☆Get ready well.

You may take paper, a pen, pencils, an eraser, a watch, and books or a dictionary with you.

☆Read the questions carefully.

You must read the questions carefully before you answer them, or you will make mistakes.

☆Breathe （呼吸） deeply.

When you feel worried, put your pencil down on the table, close your eyes, breathe deeply and count numbers to 10. In this way, you will feel relaxed and you can do well in the test.

Dorothy lived with her uncle Henry and aunt Em who were both farmers.Their house had only four walls，a floor and a small space under the floor to protect them from powerful winds.The house was in the middle of poor land with strong sunlight and few plants.Aunt Em used to be young and cheerful，but the sun and wind had taken away her happiness.Uncle Henry also looked serious and strict.Only Toto，could bring laughter into Dorothy's life.

One day，they heard low sounds of wind from both the north and the south.Uncle Henry realized a strong wind was coming.He rushed to protect the animals while Aunt Em hurried Dorothy to the basement.Suddenly，the house began to rock and rise to the air.In the center，but Dorothy found herself riding safely on the rising house.

Frightened，Toto ran around the room until Dorothy caught him and protected him from falling through the open door.She closed it carefully to avoid further danger.As hours passed，Dorothy slowly got over her fear.She finally fell asleep on her bed with Toto by her side.The wind had set Dorothy's house down gently in a beautiful country.

As she looked around, she saw green grass, fruitful trees, and colourful flowers.Birds with special feathers sang and flew around.As she stood enjoying the beautiful views, a group of strangely dressed people came near. They wore round hats that rose to a small point a foot above their heads. Three men were dressed in blue, and a little woman wore a white dress. They stopped and discussed in a low voice, as if afraid to come farther.

A big test makes students feel fear and anxiety(焦虑的). But taking tests is something faced by all students at all levels of schools. How do you prepare for the tests as well as reducing fear? {#blank#}1{#/blank#} Maybe they will be of use to you. 

Calm down. Don't panic. {#blank#}2{#/blank#} You will be focusing on the fear, and not the coming test. Many times, fear can even prevent you doing well. If you panic, take deep breaths, and think that you can do this. 

{#blank#}3{#/blank#}People who make a detailed study plan often have an easier time of their studies. When making a study plan, calculate(计算)the amount of time you have left before the exam date. Is the exam in a month? Did the teacher spring the test on you suddenly? Is it a mid-year exam that has been waiting since the start of the year? Depending on the time, make your study plan long or short. 

Take notes and ask questions. If you come across what you can't understand, write it down. {#blank#}4{#/blank#}And don't worry—you aren't stupid if you ask questions. Questions mean that you're actively learning. Besides, a question ahead of time could mean a better grade on the exam. 

Good study skills help to achieve better results with less effort. So use the ones that work for you. 

What else can you do to prepare for a test? (请用10词左右的句子回答问题){#blank#}5{#/blank#}