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Books                                  Contents
Leo the Snow Leopard By Craig Hatkoff	It was written by the best story-teller. The  story is about Leo, a young snow leopard(雪豹) that was helped by a kind man in the snowy mountains in Pakistan. Snow leopards are in danger. Leo was just two months old when he was found and he could not live in the wild on his  own.
Where Do Recyclable Materials Go By Sabbithry Persad	Tiana has been learning about recycling at  school. But after her dog, Bubbles, gets lost chasing after a recycling truck, she decides to learn  a lot more about recycling! Following Tiana, readers will learn how to take care of the environment.
The Scrap Kins Build By Brian Yanish	Meet the Scrap Kins. They are friendly monsters. In the book, they'll show you how to turn rubbish into some pretty cool things. Readers will learn how to make toy planes from plates, bags, old clothes and more. You know what they say: One person's rubbish is another person's love.
Explore( 探索) Life Cycles! By Kathleen M. Reilly	Do you know the largest seed( 种子)in the world or an egg can weigh up to 4 pounds? You'll learn about all of these things and more with the latest book in the Explore Your World series( 系列). The books give readers a good look into the life cycles of plants and animals on the Earth.

    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.

Scientists have always wanted to know more about the universe and they are working hard.

 {#blank#}1{#/blank#}(year) ago they knew many things about the moon.  {#blank#}2{#/blank#}they knew how big it is and how far it is from the earth, they wanted to know more about it. They thought sending people to the moon was the best way.

The moon is about 384,000 kilometres away  {#blank#}3{#/blank#}the earth. A plane cannot fly to the moon  {#blank#}4{#/blank#}the air is too thin at high altitude(海拔) to support the plane.

Then the scientists tried  {#blank#}5{#/blank#}(they)best to invent something that can fly even when there is no air. That is a rocket(火箭).

How does a rocket fly? There is gas(气体)in the rocket. When  {#blank#}6{#/blank#}gas is made very hot inside the rocket, it will rush out of the end of the rocket, so it can make the rocket fly up  {#blank#}7{#/blank#}(quick) into the sky.

Rockets can fly into space, Rockets with people in them  {#blank#}8{#/blank#}(be) to the moon already. Several rockets without people in them have flown to another planet much  {#blank#}9{#/blank#}(far) than to the moon. One day rockets may be able  {#blank#}10{#/blank#}(go) to any place in space. Let's hope for the coming of that day.

In America, there are chores for children of different ages. American people think it's important to tell children their duty in the family. They think that a 2-year-old child is never too young to do chores. If you have no ideas, use this list of age chores for your children.

In 2013, Chinese President Xi Jinping offered to build a Silk Road Economic Belt (经济带) and a 21st Century Maritime (海上) Silk Road, which became known as the Belt and Road Initiative (BRI, "一带一路"倡议). The BRI has brought cultures together for over ten years. As the BRI continues to bring the world together, young people from the Belt and Road countries can see how it continues to develop and have a deeper understanding of it. We did a survey of 125 Chinese students. The following survey is about BRI in the eyes of the students. The diagrams (图表) below show the results.

Diagram Ⅰ DiagramⅡ

Diagram Ⅲ Diagram Ⅳ

Look! Here are some survey results about my friends' sports things. The first is about Frank. He doesn't have {#blank#}1{#/blank#} soccer ball, but his brother Alan does. They often play it after school {#blank#}2{#/blank#} their friends. They love soccer very much {#blank#}3{#/blank#} they think it's easy. The next is about Gina. She has two soccer balls, three volleyballs and four basketballs. She says, "I love sports, but I don't play them. I only watch them {#blank#}4{#/blank#} TV!" The last is about Wang Wei. He likes ping-pong. It's {#blank#}5{#/blank#} for him. He has three ping-pong balls and two ping-pong bats.