Water is very important in our daily life. People use water without thinking every day. The water comes from clouds in the sky as rain. Rainwater fills rivers, seas and so on and 【小题1】.

The most important use of water is for drinking. Without water people can live for a week at most. We need water to cook and wash dishes, clothes and other things. 【小题2】.

Water doesn’t stay in one place for long. It is always moving from one place to another. 【小题3】. The energy in moving water can be used to produce electricity.

Water activities are enjoyable. Some people enjoy fishing and boating. 【小题4】. People can do lots of different activities on the water and have great fun. 【小题5】. We must save it and make better use of it.

In a lake along the middle of the Yangtze River, a sound breaks the silence (寂静) of water. An animal appears to enjoy the fresh air: It’s a Yangtze finless porpoise (江豚) — a kind of animal in danger in China.

The Yangtze finless porpoise is famous for its beautiful smile. That’s why people love it so much. The Yangtze River is home to the Yangtze finless porpoise.

However, the number of the finless porpoises is becoming smaller and smaller. People take so many fish from the river, so the number of fish in it becomes smaller. It makes the finless porpoises have less food to eat. What’s worse, their living environment isn’t so good as before because of water pollution.

________ There are some reasons. First, Yangtze finless porpoises are important to the environment. They eat fish and help keep the local food chain balanced (保持当地食物链平衡). Second, we’re helping keep the river clean by protecting Yangtze finless porpoises.

People care more about the environment now. In fact, everyone plays a part in protecting it. Then the animals can live more comfortably, a teacher said. “It’s important and necessary for us to protect our environment and other life on Earth.”

April 22 is Earth Day. Everyone on earth should care about and protect the earth! The earth has warmed by about 1 °F 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. 【小题1】

First, greenhouse effect (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. 【小题2】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. 【小题3】 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 metre by 2100.

People can affect the earth's air, land and water. As for us, we can do many things to protect the earth. 【小题4】 We can tell more people about protecting the earth.