The earth is our home. We must take care of it. Life today is easier than it was hundreds of years ago, but it has brought some new problems. {#blank#}1{#/blank#}. We can see it, smell it, drink it and even hear it. Man has polluted the earth. The more people, the more pollution. {#blank#}2{#/blank#}, the problem was not so serious. When the land was used up, the river was not clean in a place, man went to another place. Now man is slowly polluting the whole world. {#blank#}3{#/blank#}, It's bad for living things in the world. Many countries don't let burn something bad for air in houses and factories in the city. Pollution by SO₂ is now the most dangerous kind of air pollution. It's caused by heavy traffic. {#blank#}4{#/blank#}. When you are riding, there is no pollution. But even in developed countries, most people don't go to work by bike. It's not because bikes are expensive or people are tired if they ride to work. It's because the number of cars on the roads becomes larger. So more people put away their bikes and go to work by cars, then things getting worse and worse. {#blank#}5{#/blank#} and make it so difficult and expensive for drivers to take their cars into the city that they will go back to use their bikes.

A. For industry was not well-developed.

B. We should have special roads only for bikes

C. Air pollution is still the most serious

D. Because there were not so many people many years ago

E. People say it's best to ride bikes

F. One of the biggest problems is pollution

    People go to work in different ways. They work from Monday to Friday. Some people go to work on foot because they live near their workplaces. Some people go to work by bike because they live far from their workplaces, or they like riding bikes. They think it's good for their health（健康）. Today more people have own cars, so they can go to work in their cars. In the south of China, many people even go to work by boat because water is around their houses. Will people go to work by plane? I think so，if necessary.

    In order to learn how the students in our school spend money, we made a survey by asking them some questions. First, we asked them how much money they spent last month. And then we asked how much money they spent on snacks, books, movies, computer games, phones, transportation and other things last month. Our maths teacher helped us make a graph（图表） of their answers as follows.

    In our school, each student spent about{#blank#}1{#/blank#} yuan on average（平均）last month. According to the graph made by our{#blank#}2{#/blank#} teacher, we know how much money the students spent on different things in our school. As the graph shows, they spent most on{#blank#}3{#/blank#} , covering 22% of all. It was followed by computer games and movies. Each of them was {#blank#}4{#/blank#}  . But to our surprise, he students spent {#blank#}5{#/blank#} on books, only 6%.

A. When you're with friends on bikes, it's much safer to ride behind, not next to each other. Where one road meets another, you should take even more care. Slow down and check both roads.

B. If you have an accident or fall off your bike, a helmet will protect your head. It must be the right size.

C. Many children have accidents when they listen to the music while riding. It's important to hear everyone else on the road.

D. Before you even set out, it is important to ensure that your bike is roadworthy（适于行驶的）and safe. Do all the parts work properly?Is there enough air in your tyres（轮胎）?

E. Cycling at night can be really dangerous. Go slower than you would in the daytime.

F. Red traffic lights aren't only for cars and buses. They're for you too if you're on a bike.

    Many of us don't pay much attention to the importance of eye care. It is said that if you take care of your body, then you can surely be healthy. That is why our eyes should be given a lot of care. Natural eye care should be put in a number one place.

There are several causes leading to poor eyesight like not enough food, genes (基因) and aging (老化). Televisions, computers and reading are also the causes of having poor eyesight.

    If you happen to work in front of the computer, it is best to take a break every once in a while. Something dirty can cause redness and they will make you feel uncomfortable. It is bad for your eyes, too. If this happens, the best way is to clean your eyes by using cold water. You must also try your best to protect your eyes from harmful things. For example, sunglasses are not just for fashion but they can also serve as a great way to protect your eyesight form UV rays(紫外线).

    Eating healthy food will do good to your eyesight. Remember that vitamins A, C and E are good for eyes. Try to eat food groups that have these vitamins. And you should do eye exercises because exercise protects your eyesight, too. If a person exercises regularly and eats the right kind of food, his eyes will stay in good condition for a long time.

    All above are natural ways of eye care that help us keep healthy eyes. Being happy all the time can also be helpful to a person's eyesight, too. In a word, eye care is very important, no matter how old a person is.

    You may think there is only sand in the desert of the world, but it is not true. In the desert, as we know, there is a little rain, but it is not enough for most plants. We can still see some plants live in the desert. There is water in some places in the desert. We call these places oases(绿洲).In the oases, there are villages and towns. People grow all kinds of crops in the fields there.

    People also live outside the oases. They have camels, sheep and other animals. These animals depend on the desert plants for their food and do not need much water.

    The animals are useful to the desert people in many ways. They eat the meat and drink the milk of the animals. They use the camels for carrying water, food, tents and something else.

    The people of the desert have to keep moving from place to place. They must always look for grass or desert plants for their animals. When there is no more food for their animals, they move to another place. The desert people are friendly. No man in the desert would ever refuse to help the people in trouble and give them food and water.

    Many people think there is {#blank#}1{#/blank#} but sand in the desert. In fact, there is water in some places in the desert. These places are {#blank#}2{#/blank#} oases. People live there and grow all kinds of crops in the fields there. People live outside the oases, too. They have different kinds of animals, such as camels and sheep. The animals are useful to the people {#blank#}3{#/blank#} in the desert. They offer people meat and milk and help people {#blank#}4{#/blank#}things. The desert people keep moving from one place to another. They are so friendly that they would {#blank#}5{#/blank#} refuse to help anyone in trouble.