Most of us have three meals a day .We take food for granted(想当然)。And we don't think about it. 1 experts argue a food crisis(危机)is coming.This crisis is going to make us 2 the way we think about food.

 Food is in great need 3a growing of world population.By 1960,the population was three billion.It doubled to six billion by 1999.By 2050,this planet will need to  4 at least nine billion people.As a result,the food prices get higher and higher.

 So,what can a   5 ,crowed world do?One suggestion is to eat less meat.Meat uses more natural resources(资源)than grains(谷物) .It requires more  6  to produce one pound of meat than to produce one pound of grain. It also requires between 5 and 10 times more water than vegetables. So ,eating less meat will  7  more land for farming,and it will save water.

 To eat less meat,people will need to change their eating habits. That will not be easy. Americans, for example,have 8 loved meat.  In general, They eat twice as much meat as people in other countries.At the same time,in developing countries like China and Brazil,sales of meat have doubled in the last 20 years.   9  will double again by 2050.Growing need of meat wil continue to put pressure on natural resources.

 World  population is increasing,resources are becoming fewer,and food prices are rising.Therefore, we need to rethink what  we eat every day. For meat lovers, we don't  need to give up meat  10 .But we need to eat more grains and less meat.

    Hearing is very important to all of us. We can 1 beautiful music, nice songs of birds, the laughter（笑声） of people or other different kinds of 2 in the world with our ears. 3 we must try to protect our ears. The following will tell you 4 protect ears.

    Listening to 5 music a lot can be bad for ears, 6 when headphones (耳机) are used. So 7 the volume(音) when you're wearing headphones or try not to wear headphones. You should give your ears a rest if you like wearing headphones. Before swimming, remember 8 earplugs （耳塞) into y our ears or wear a swim hat to stop water 9 into your ears.

    If you are going to a concert, wear earplugs to protect your ears 10 the terrible music! 11, special ear can be made for you if you go to concerts a lot or if you are a musician yourself.

    See a doctor if your ears 12. 13 some medicine if the doctor asks you to do so. 14 the advice above now and you won't be saying “what?" when you are getting 15.

根据短文内容及首字母提示,填写所缺单词。

    Hip-hop dancing(街舞) is popular with many young people today. They like it b{#blank#}1{#/blank#} they can invent their own moves. They use this dance to s{#blank#}2{#/blank#} their love for life. It a{#blank#}3{#/blank#} shows that they feel good about life, that they just want to be themselves and enjoy life, and that they are not afraid of problems.

    Hip-hop dancing has a h{#blank#}4{#/blank#} of more than 20 years. It f{#blank#}5{#/blank#} began in the 1980s in the US. In early times, it was seen in New York and Los Angles. At that time, many young black people often danced to the m{#blank#}6{#/blank#} in the streets. They used their l{#blank#}7{#/blank#}, arms, heads and even shoulders to dance. Many young people still use most of these moves today.

    Hip-hop dancing became popular all over the world because of the 1983 movie Flashdance. Some people performed Hip-hop dancing in the movie People enjoyed their performance. They began to dance l{#blank#}8{#/blank#} them. Then it became popular There are t{#blank#}9{#/blank#} kinds of Hip-hop dancing: new school and old school. More and more young people are l{#blank#}10{#/blank#} Hip-hop dancing. People believe that it is a good way to exercise their bodies, and that it is good for their health.

     Nowadays, many people drive their cars to work. There are a lot of cars in the street and the 1is very busy. So sometimes 2is not easy for people to get to work on time. When you are going to be late, you only dream of taking a plane there. Can your dream3?

Yes! You can take a plane only in months!

     Four engineers in Germany are4in making planes. They are making a newplane—Lilium jet. It doesn't look like a plane 5an egg. Many people think it looks funny and interesting. The great "egg" can take two people to the sky and 6three hundred kilometres in one hour. That's really great.

     Some people call Lilium jet "a flying car". Why?  Firstly, it's not difficult for people to learn to drive it. People can drive it just like driving a car. But it can go 7and farther than a car. Secondly, Lilium jet is not very big, only a quarter of a plane. So it doesn't need an airport. Only a small place is OK. It can stop8. In the future, the "flying car" will come into people's life and 9our ways of trip.

     Lilium jet will come on the market soon. 10you want to make your trip easy and funny, why not buy one?  I'm sure you will have a good time on it.

    There are many ways for us to reduce waste. For 1, we can reuse paper and plastic bags. We can also recycle newspapers, glass, and cans to2 new things. Here are some 3 ways to reduce waste.

Write on 4 sides of paper.

    Many people write on only one side of their paper. Why not stop 5the other side? Some students only use half the pages of their notebooks before getting new ones. Try to use up all the paper. People often give cards on birthdays or festivals. How about trying to 6 e-cards instead?

Don't throw away your old batteries (电池).

    Maybe you do not know that old batteries make the earth dirty. This is 7  they have poisonous parts in them. So, don't throw away batteries. Keep them together. Try to use rechargeable (充电的) batteries for your games and CD players.

    Give off all your unwanted clothes.

    There are many poor families in China. You may ask your mother to 8 your unwanted(多余的) 9. Then you can pass them on to those poor children. You will feel 10that you are helping someone else. Also, you can understand if your friends or relatives (亲戚) want them before throwing them away.

    Giraffes are beautiful, smart and friendly. They have long legs and necks (脖子). They are so tall that they can grow up over 5 meters (米). So how do they sleep or drink?

    You may think it's difficult for them to sleep, but they have no such problems because giraffes don't often stop for a sleep. Giraffes just need to sleep about thirty minutes a day. When they sleep, they don't always lie down (躺下). They usually sleep for minutes at a time, because it's difficult for them to get up again. And it's a great danger to sleep in the wild (荒野). But the giraffes in the zoo sleep for about 4-6 hours every day. They usually lie down when they sleep.

    Drinking water is a big problem for giraffes because their long necks are too "short". To drink water, they must spread (伸展) their front legs in a difficult way. And in this way, other animals like Africa's big cats can easily hunt (猎食) them. So they usually get most of their water from the trees and flowers. Giraffes don't need to drink water very often. They can even drink no water for months!