—Yes, I _________ lots of time on it. It's a good way to kill time.

—You'd better not. It's bad for you _________ too much junk food.

—My bike doesn't work.

We know that trees are useful in our everyday life.

They 1 us many things, such as wood, oxygen, rubber, medicines and many other things. They can 2 tell us a lot about our climate. If you 3 a tree, you can see that it has many rings. Most trees grow one new ring 4 year. Because of that, we know 5 a tree is. A tree over a hundred years old means that it has more than a hundred 6 . When the climate is dry or very cold, the trees do not grow very much and their rings are usually 7 . When it is wet and warm, the rings are much thicker. If the rings are suddenly very thin or suddenly very thick, this means that the 8 changed suddenly. If we look at the rings on this tree, we can learn about the 9 for a hundred years. We can see 10 our climate is changing today.

We often face the following situations in our daily life：

●The woman next door plays her piano after 12 o'clock at night.

●The family across the street never cleans up their yard.The rubbish blows into your yard.

●The man next door always parks his car in front of your drive.

Have things like this ever happened to you? If so, you may ask yourself, "Who are these people? Why are they doing these things to me？"

These days, many people don't know their neighbors. Sometimes we share a friendly smile or say hello, but lots of people don't even know their neighbor's names! When you don't know someone, it's easy to be angry when something has happened that you think is unfair. You think, "Maybe they like to make me angry, " or "Maybe they do it on purpose." Believe it or not, your neighbors probably don't mean to irritate(激怒)you. Often, they don't even know that they're making you feel angry. So before you take unusual steps to fix the problem, you should discuss it with them first.

When you move towards your neighbors, you should talk to them in a friendly manner.Praise their children to make them feel good. Then explain the situation. And if you can think of a simple way to solve the problem, suggest it.

If talking doesn't work, ask another person to help. This person can listen to both sides of the story and help you and your neighbor solve the situation.

Finally, sometimes it's a good idea to avoid the problem. Depending on the problem, it might be best to just stay out of your neighbor's way.

There are some easy things you can do tothe environment and the earth. Choose ideas from the list or comewith a few of your own. 

·Plant flowers, grass or trees. 

·Whenever you visit a park or beach, take away what you bring there—keep rubbish in a bagyou can put it in a dustbin. 

·Turnthe lights and TV sets when you leave the room. This can save a lot of electricity. 

·Turn off the tap when you brush your teeth. You can save some water by not letting it run. Also, use a glass cupof a paper cup because this saves paper. 

·Keep the doors and windowsin winter to keep warm air in. 

·Give your old books and magazinesa library instead of throwing them away. 

·Give your old clothes to poor children you know instead of throwing them away. 

·Use both sides of paper. 

·Stopdirty water into the rivers or lakes nearby. 

·Encourage all your friends to do the same things you do to help protect the earth. 

You don't have tountil Earth Day to do these things. Make every day Earth Day. If everyone makes a contribution to protecting the, the world will become much more beautiful.