阅读下面短文，然后根据短文内容，从各题所给的四个选项中，选出一个最佳答案，

The weather is closely related(联系) to our life. It is all around us all the time. It is an important part of our lives. We cannot control it, but it often controls how and 1 we live, what we do, what we wear and what we eat. Read this passage and learn2 about the weather.

What is the weather?

The weather is just the state of the atmosphere3any time, such as temperature, wind,4sun,etc.

What makes the weather change?

As we know, not every place on the earth gets the same amount of sunlight. Some places get5unlight, so it's warmer in those places. However, some places get little 6no sunlight in winter. Then those places have colder temperatures. These differences in temperature make the air and water 7 around the earth. The movement helps to take the heat energy from the sun across the earth. So the8 changes.

What's the difference between weather and climate?

Climate is a place's weather over a long time. The weather changes from day to day and 9from hour to hour. It can be sunny in the morning and cold and wet in the afternoon. But the climate changes very 10over lots of years. 

    April 22 is Earth Day. Everyone on Earth should care about and protect the earth!

The earth has warmed by about 1°F (华氏度) over the past 100 years, but why and how? Well, scientists are not quite sure. Maybe the earth gets warmer and warmer on its own. But many scientists say that people are doing many things which make the earth warmer. First, greenhouse effect (温室效应) is a very important reason for the change of the earth. People give out too much energy into the air every year. It makes the earth warmer. Climate (气候) change is another important reason. Sometimes it becomes too hot and sometimes too cold. Sometimes there is too much rain and sometimes too little. The change of the climate makes the earth warmer. In turn, the warmth of the earth changes the climate, too.

When the earth becomes warmer, there may be more rain and a rise in sea level. It will affect the growth of plants, animals and people. On a Pacific island, 100 people have to move to higher ground because the sea is rising. These people can no longer live on the coast. Before that, two islands without people went underwater in 1999. Scientists say that the seas can rise by nearly one meter by 2100.

People can affect the earth's air, land and water. As for us, we can do many things to protect the earth. For example, we can use fridges less. We can tell more people about protecting the earth.

    Natural resources that we use are things that come from the Earth.

    Our natural resources are limited(有限的）. This means that they will not1 forever. Some are renewable, like when you plant a new tree when you2 one down. Others are not renewable, like when you dig coal(煤）out of the3. Once it is used, it is gone.

    People realize the4 that the Earth's natural resources are limited, and people can do things to help conserve(节约）those resources. 5 you try to conserve a natural resource, you try to use less of it so it does not run out so 6One way that people conserve fuel, like gasoline, is by riding a bicycle or walking when the 7 is short instead of driving everywhere.

    Water is a very important natural resource because we all need it to stay 8. We can conserve water9 making sure that the pipes and taps do not leak(漏）. We can also make10 choices to conserve water, like only using the dishwasher or washing machine when they are full. Everyone can make contribution to protecting natural resources.

    For the first time. scientist have made clones(克隆) of monkeys. A clone is a copy of a living thing. A team of Chinese 1used cloning to make two baby monkeys. Both are girls. They are named ZhongZhong and Huahua.

    Scientist have cloned other kinds of 2. They have cloned dogs and cats, they have also cloned pigs, cows and ponies. The 3animals to be cloned in the world was a sheep named Dolly. She 4in 1966.

    Scientist had never been able to clone primates (灵长类动物), Primates are a group of animals. They include monkeys. apes (猿) and people. Now, that has come true. Soon scientist may be able to clone 5 too. However, the Chinese scientist will not be cloning people, they will keep cloning monkeys6monkeys are more like people than other lab animals such as mice or rats. Lab animals can help to study diseases. Cloning monkeys is 7to the scientist for medical studies.

    However, there are still reasons that some scientists want to8people. For example, some parents might want to clone a child who has died. Yet the cloned Child would 9really be the same. They would look like the same, but would not be the same one. It might be hard for them to know that they were a clone of10else.

    A famous designer(设计师) and a university student produce a new cup called Vessyl. They have spent several years1it. The smart cup can not only tell Coca Cola from Pepsi Cola,2also tell people whether they should drink water or not.

    When people3liquid(液体) into this smart cup, a few seconds(秒) later, it can check this kind of liquid and tell them what it is. Then it gives4information of the drink, such as sugar, fat and calorie. When people put the cup in their5, it can also show them the condition of their bodies. If they are6, I can tell them to drink water.

    "My partner and I want people to7healthy. In modern society, people are usually8busy to do exercise, or even drink enough water every day. They have much9. We produce this smart cup so that people can make a choice10," the designer said.