We know the earth is a planet．There are seven other planets，and they go  1 the sun together．The eight planets and the sun are2 the solar system．The first planet，3   the sun，is Mercury(水星)．It is 58 miIlion  4  from the sun．Venus(金星)is the second planetfrom the sun，and  5 planet，the earth，is the third．It is from the sun,and 55  planet,the earth,is the third.It is 2,650 million kilometres from the sun．

    Jupiter(木星)，Saturn(土星)，Neptune(海王星)and Uranus(天王星)are all 6 than the earth，7 Venus，Mars and Mercury are smaller than the earth．

    Animals，trees and humans can only 8  on the earth，because the other planets in our solar system don't  9  air or water．Do any  10planets in   solar systems have life?We don't know about it．

    Nowadays, WeChat is becoming more and more popular in China. No matter where we are, we can sign up and send text or voice messages to our friends. We can also find a stranger to talk to by shaking the 1^. Another funny function is that WeChat can help to search for people  2 live nearby with the programme on. Many people like this function, 3 it can help them to find more people who they may know.

    In my opinion, WeChat is really4 useful chatting tool. It can help people 5 with their friends more easily.6 , it is also bad for people, especially for students .As you see, some people use WeChat 7 too long. It is not healthy to them .So I have some 8 on how to use it in a correct way. First, we should not use it when we are studying. We can't focus on our study if we use it. Second, we must be careful. We should neither show too much personal information9 trust strangers so much.

    We should learn how to use it properly. Remember, WeChat is not everything in your life.10depend too much on it.

    Do you often drink bottled drinks? Of course 1  is so cool to get a cold one right out of the fridge, right? But all those plastic bottles use a lot of oil and  2 the environment. Americans buy 3 bottled water than any other nation in the world. In order to make all these bottles, 17 million barrels (桶) of oil  4up. That's enough oil to keep a million cars going for twelve months.

    Many people choose 5 the bottles away after having the bottled drinks. In fact, instead of going out with the trash, plastic bottles can be turned into carpeting for clothing. Remember this: Recycling one plastic bottle  6save enough energy to power a 60-watt light bulb for six hours.7 , for every six water bottles we use, only one is recycled. The rest are sent as garbage (垃圾). Or, even worse, they end up 8  trash on the land or in rivers and oceans.

    So why don't more people drink water from the kitchen? Some people drink bottled water 9 they think it is better for them, but that's not true. The chemicals in the bottles themselves may get into the water which can do harm to people.

    So next time when you have drinks or water, please  10 to use a glass at home or carry water in a steel bottle. And if you want to do something more, try to collect plastic bottles and send them for recycling.

Giraffes are the tallest animals on the Earth. Male giraffes can grow to a h{#blank#}1{#/blank#}of about 17 feet. An adult giraffe can look into your bedroom window on the second floor.

Giraffes only live on the continent of Africa. The only giraffes in China are f{#blank#}2{#/blank#}in zoos or animal parks. V{#blank#}3{#/blank#}love to see the giraffes because they are so tall.

Giraffes love to eat leaves. With their longest necks, they can e{#blank#}4{#/blank#}eat leaves from the tops of trees. Giraffes don't d {#blank#}5{#/blank#}much water. They get much of the water they need from the leaves they eat.

You know an apple is healthier than candy. But how do you make changes and eat really healthy food all the time? Start here with these wonderful rules.

You can finish all of the work in less than ten minutes.

Rule 1: Eat two pounds of vegetables. Remember to eat many vegetables every day. One pound is cooked and one pound is raw. They really help you to fight against some discases(疾病) and protect your health.

Rule 2: Put an egg on your meal. The egg is a kind of wonderful food. As long as you have eggs in your fridge, you can make a healthy meal with a fried egg, or add an egg to a bowl of rice.

Rule 3: Eat a little junk food. Junk food is delicious but it is not good for our health. But it's so cheap that you may like eating too often Eating it a little can be possible.

Rule 4: Eat some desserts(甜点) every day, but not too much. Not all desserts can make you fat. Some of them are delicious and healthy. A chocolate is a kind of dessert. And it's good for you to eat a little chocolate. Be smart enough to choose some desserts and try to improve your health.