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We that have eyes to see and ears to hear can learn easily. But Helen Keller could not as she was both blind and deaf. Even in her affliction, she did not allow herself to be handicapped. She made full use of all the other faculties she had, to such and advantage that she became the world's well-known teacher of the blind and deaf.

Each animal and plant in the world has its own environment, the place where it can live most easily. Each animal needs other animals and plants which live in the same environment. In Arctic, polar bears eat seals and fish, seals eat fish, and big fish eat smaller fish. The small fish eat very small animals and plants in the sea. This is called a food chain.

A thirsty crow found a pitcher with some water in it, but there was so little that the crow could not reach it with her beak. It seemed that she would die of thirst within sight of what could save her. At last she hit upon a clever plan. She began dropping pebbles into the piitcher. With each pebble, the water rose a littlehigher until it reached the brim. The knowing bird was able to quench her thirst.

The earth is roating sphere moving through space. Enclosing the earth is a thin shell of gas called atmosphere. The atmosphere is an invisible air mixture. The mixture consists mainly of nitrogen, oxygen and water vapor.

You forget most quickly right after you read or hear something new. You should review at once so you won't forget, and if possible, explain it to someone else. When you review and test yourself on the material, you are being active; active learning is better than just reading or listening. You remember more and save time in the end if you spend at least one-third of your time on active review.

Have you ever seen a forest fire? It is a terrifying thing to see. The flames run along the ground licking up the leaves and dead branches. No wonder those whose homes are near gather quickly to fight the fire. If the fire cannot be stopped, these people will lose everything. Water can seldom be used to put out a forest fire because water is not available most of the time.

If you are under eighteen, you will probably soon be called upon to make one of the important decisions of your life - a decision that will have far - reaching effects upon your happiness, your income, your health. What is the tremendous decision? It is, how are you going to make a living?

From this simple experiment, we can clearly see the effect of water pollution on the growth of plants. Our hypothesis is supposted that the more the water is polluted, the more seriously it will injure the growth of plants. From this experiment, we also realize the importance of keeping our environment clean.

I was not a greedy man, but I thought half a million dollars was a rather high price for keeping my freedom. I therefore decided to make the great sacrifice. It was easier said than done. The doctor was certain my uncle would be dead within two weeks. That put me in a difficult position. Besides being forty years old, Iwas also ugly. I had no lady friends. I couldn't possibly advertise myself as wealthy until I inherited my uncle's fortune. Advertise! What a good idea!

Remember to buy fruit and vegetables in season. The seasonal ones would cost much less. The fresher the produce, the higher the nutritional value and the better the taste. Do not buy fruit that is very ripe unless you are going to use it at once. Fruit can quickly become overripe.

Although there are many different sizes and types of vending machines, they all work basically in the same way. The customer puts a coin into the machine and then pushes a button, pulls a lever, or opens a door to receive the merchandise. Some machines will also return change to the customer, and a few will make change for paper money. But the basic idea is the same. Customers like to save time and are usually willing to pay a higher price for this convenience.

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The early settlers of Greenland brought with them from Iceland horses, cattle, sheep, goats, and hens. The most important of these animals, on the whole, were the sheep. Sheep were able to feed out all winter, as they do in America's Midwest today. Of course, it was, and still is, advisable to set aside some hay for them in case of a spell of particularly. bad weather.

Some sources of energy are plentiful but not used much. Sunlight and wind are two examples. They are unlimited and cannot run out. Besides, using them tends to be less harmful to the environment than using other sources. Why doesn't the world use more sun and wind?

Some signs are notices which warn you of danger. Some ask you to do something. Others ask for your help. Warned by a notice, you may fell you should not do something that you would like to do. Asked for help, you may fell like doing something for the person who has put up the notice. Some signs help you to find your way to a place, and without them you might find yourself lost in a strange town.