of the boys in my class playing basketball.

is his home away from his school?

he go to live to find some peace and quiet.

    When the weather is hot, you go to a lake or an ocean. When you are near a lake or an Ocean, you feel cool. Why? The sun makes the earth hot, but it cannot make the water very hot. Although the air over the earth becomes hot, the air over the water is still cool. The hot air over the earth goes up. Then the cool air over the water moves in and takes the place of the hot air.

    Then you may ask, "Why is the ocean full of salt?" Scientists will say that the salt comes from the rocks. When the rocks get very hot or very cold, they crack (爆裂). Rain falls into the cracks. The rain then carries the salt into the earth and into the rivers. The rivers carry the salt into the ocean. And then you may doubt, "But the ocean does not get more salty every year. Scientists are not sure about the answer to this question.

    We know a lot about our world. But there are still many answers that we do not have, and we are curious about them.

    Mrs Wilson, the middle-aged wife of a rich businessman, invited some of her friends to lunch. She was very anxious to try a new way of cooking a fish dish, and she was very pleased with herself when the dish was ready. As the dish was very 1, she put it near the open window to cool it for a few minutes.2, five minutes later, when she came back for it, she was frightened to find her neighbour's cat, Chester, at the dish. Luckily she was3to stop the cat from eating the fish. That afternoon was a great success and everyone enjoyed the dish very much.

    At the end of the afternoon, while she was4, Mrs Wilson felt tired but happy. She was in an armchair just near the window, when through the window she was surprised to see the neighbour's cat5in the garden. Why, the fish dish must be poisonous (有毒的). What would happen to her friends? She at once phoned the family doctor for advice. The doctor told her to telephone each of the visitors to meet him at the hospital as soon as possible. Finally, the danger was 6. Once again Mrs Wilson was alone in her armchair in the living room, still tired but7happy. Just then, the phone rang. It was her neighbour. "Oh, Millie, her neighbour cried, "Chester is dead. She was killed by someone in the car and thrown in your garden. "