Here is a story: A man sees a butterfly (蝴蝶) . The butterfly tries to get out of its chrysalis (蛹) . F{#blank#}1{#/blank#}sorry for it, the man decides to help. He cuts the chrysalis and the butterfly comes out e{#blank#}2{#/blank#}. Surprisingly enough, the butterfly is unable to fly. If the butterfly doesn't struggle (挣扎；奋斗) to leave the chrysalis, it can't fly！The struggle develops the e{#blank#}3{#/blank#} in the butterfly which makes it fly. Similarly, the challenges of life bring out the best in young people and make the fly.

When people are young, meeting and overcoming challenges will make them s{#blank#}4{#/blank#} and ready to face life.

When we look at successful people, we see that the most successful of them are people who have had to struggle.

One famous businessman, who now o{#blank#}5{#/blank#}many big supermarkets, used to carry clothes on his back and sell them from door to door when he was young. Another successful man is Dennis. His father died when he was only twenty. He had to b{#blank#}6{#/blank#}up a big family. He took up the challenges and overcame them. Today his brothers and sisters are leading s{#blank#}7{#/blank#} lives.

Sometimes challenges do not appear to us because we keep away from them. So, some parents and teachers actively encourage young people to face challenges. They might organize some a{#blank#}8{#/blank#}for young people which provide them with challenges, like rock—climbing, camping, volunteer work and so on. However, just passing exams will not prepare a person for life. We must meet and overcome challenges. The young people of today will become the leaders of t{#blank#}9{#/blank#}. For countries to continue to become successful, it is i{#blank#}10{#/blank#}that the young people learn to meet challenges and overcome them.

Welcome to Beijing, the capital city of China. I'm Ma Li. I'll be your1 . You'll have a two-day tour in Beijing. 

On the first day, you'll get up2 in the morning and then go to Tian'anmen Square to watch the flag-raising ceremony(升旗仪式). After that, you can take a walk in the square. At about half past eight, you'll3 the Palace Museum. There you'll see many4 things in ancient times. At eleven o'clock, you'll walk to Beihai Park and stay there for two and a half5 . You can go boating in the park. In the afternoon, you'll go to Wangfujing Dajie. There are many large shops6 the street. There you can go7 and buy your favourite things. 

On the second day, you'll go to the Great Wall after you have breakfast. You'll have two hours to8 on the wall. So don't9 your mobile phones and cameras in the hotel rooms. After you have lunch in a10 , you'll leave for the Olympic Sports Centre. After that, you'll go to the Summer Palace. At six o'clock, you'll11 your tour and go back to your hotel.

Living in a big city also12 a few bad things. People are everywhere, especially on the underground. There are a lot of cars. So the traffic is a little13 because of traffic jams. 

Come and visit Beijing. And I14 you will fall in love with this city. I'm sure that you will have a15 time during your two-day tour in Beijing. 

A clothing company, Takikou, has recently made a new creation—a wearable beanbag. It {#blank#}1{#/blank#}(allow) you to comfortably sit or lie down anytime, anywhere.

When thinking about top comfort, a big beanbag that you can wear is probably not the first thing that comes to your mind. But according to Takikou, that's {#blank#}2{#/blank#}(exact) what its new wearable beanbag is about.

This funny {#blank#}3{#/blank#}(invent) was inspired by the idea of a "cushion(靠垫) that saves people". It mainly focuses {#blank#}4{#/blank#} offering people top comfort that they don't ever want to move. "This idea would allow you to completely let go, anytime, anywhere. You can put this on {#blank#}5{#/blank#}(relax) in your living room, or many other places. That's{#blank#}6{#/blank#} we created it," Takikawa said.

The wearable beanbag{#blank#}7{#/blank#}(be) on sale in Japan since a few months ago, but it has become hot recently because{#blank#}8{#/blank#} video of a person wearing it spread quickly online. The wearable beanbag has three different{#blank#}9{#/blank#}(size) and colors, and it is easy to get in and out of. The adult version(版本) weighs around 5 kilograms, so it's a bit{#blank#}10{#/blank#}(heavy) than your common clothes.

Demand for wearable beanbags has greatly increased after large numbers of media reports, so would you like to have one?

I am Grace. Here is my family. 

Nigeria is a hot and dry country in Africa where electricity is not available to many homes. Most people grow and sell their own fruit and vegetables. Keeping them fresh in the hot place is a real challenge. Without a fridge, most fresh food goes bad in a couple of days. Throwing away the food means losing money for poor families. Eating the bad food causes serious health problems. 

Local teacher Mohammed Bah Abba was worried about this problem and decided to solve it. As a boy born into a family of clay pot（陶罐）makers, Mohammed knew that these traditional clay pots could keep water even when dry. In the 1990s he used this traditional knowledge and his understanding of science to invent a cooling system（冷却系统）. It worked as a"desert fridge". 

Mohammed's cooling system is made up of two pots —a small pot inside a larger pot. In the space between the two clay pots, there is wet sand. People put the fruit and vegetables in the smaller pot, and cover it with a wet cloth（布）. Then they leave the larger pot in a dry place. When water from the sand evaporates（蒸发）, it causes the temperature in the pots to go down. This way the food in the smaller pot is cool. 

With the pot-in-pot cooling system, food stays fresh much longer. Mohammed's "desert fridge" has improved the lives of thousands of people. So in 2001 he won the Rolex Award for Enterprise, which is for the people who try to make the world a better place. 

①Around the world, many wild animals are in danger of extinction(灭绝) because they have no place to live in. Endangered(濒危的) wild animals live all over the world and you may find some in your home town. Here are some steps for protecting endangered animals. 

②Step 1: Find out what animals are in danger. Spend some time learning about animals and what their favourite places are. 

③Step 2: Do something for nature reserves(自然保护区). Nature reserves are good places to help protect endangered animals. You can give some money to nature reserves or spend your time helping nature reserves to protect endangered animals. 

④Step 3: Never buy anything that are made____from endangered animals. Don't do harm to endangered animals or their living places. Instead, we should try our best to protect them. 

⑤Step 4: Join an endangered animal protection organisation. You can save animals through these organisations by planting more trees and calling for more people to protect animals. 

⑥If everyone works hard to protect endangered animals, we'll get a more beautiful world. Let's take action from now on!