Computers can injure you. Most other injuries happen suddenly. For example, if you fall off a bike and break your arms, it happens very quickly. But computer injuries slowly.
　You probably know how to ride a bike safely. Now learn to use a computer safely.
Your eyes
　Too much light can injure your eyes, so never sit too close to a computer screen. Your eyes should be at least 50 centimeters from the screen. Remember to look away from it sometimes. This gives your eyes a rest.
　When you use a computer, the window should be on your left or your right. If it is behind you, the light will reflect on (反射) the screen. If the window is in front of you, the sun and the screen will both shine into your eyes.
Your hands and wrists (手腕)
　　Hand and wrist injuries can happen because the hands and wrists are moved in the same way hundreds of times. If you use a keyboard for a long time, follow these three rules: 1) Rest your wrists on something. 2) Keep your elbows (肘部） at the same height as the keyboard. 3) Stop something and exercise your hands, wrists and fingers in a different way.
Your back
　　Some people sit for many hours in front of a computer. If you sit in the wrong way, you can injure your back or your neck. So you should sit with your back straight. The top part of the screen should all be in front of your eyes. Your forearms（前臂）, wrists, hands and the upper（上部） part of your legs should all be parallel (平行) to the floor. If you are sitting for a long time, get up every 30 minutes and exercise your arms, legs and necks.
　Enjoy your computer, but use it safely.
【小题1】A computer screen may injure your eyes if __________.

Dogs are people's friends. They will do anything their masters(主人)ask them to do and they do their duty very well.

　　 Curly is my black dog. He is big and strong. He is strong enough to carry me on his 　　 56　 . He likes running and playing with me. He likes to 　　57　 .my father around in the fields, too.

　　 One day my father took off his coat. put it on the ground　 58　 a big tree and said to Curly. “　 59　 my coat.”

　　 Curly sat down on the coat. Then my father remembered he had to　 60　 dinner for the

Family.　 61　 he went home and forgot all about his coat and dog

　　 Late in the evening I　 62　 my dog and looked for him everywhere in the yard. I called, "Curly, Curly!" But Curly did not answer.

　　 Soon my father wanted something in his coat pocket(口袋). Suddenly he remembered 　　63　 he had done. Quickly he went back to the big tree. What do you think he saw? Curly was 　 64　 sitting on the coat! He was afraid someone would take it 　　65 .

56. A. hand　　　　　 B. back　　　　　　　 C. foot　　　　　　　 D. leg

57. A. follow　　　　 B. put　　　　　　　　 C. go　　　　　　　　 D. run

58. A. for　　　 　　 B. under　　　　　　　 C. to　　　　　　　　 D. from

59. A. Look　　　　　 B. Listen　　　　　　 C. Watch　　　　　　　 D. Hear

60. A. fix　　　　　　 B. discover　　　　　 C. cook　　　　　　　 D. tell

61. A. Because　　　 B. So　　　　　　　 　C. Though　　　　　　 D. Or

62. A. hoped　　　　 B. rode　　　　　　　 C. missed　　　　　　 D. saw

63. A. that　　　　 B. what　　　　　　　 C. if　　　　　　　　 D. who

64. A. always　　　 B. often　　　　　　　 C. still　　　　　　　 D. usually

65. A. away　　　　　 B. in　　　　　　　　 C. down　　　　　　　 D. for

A thousand years ago Hong Kong was covered by a thick forest. As more and more people came to 　31　 in Hong Kong, these trees were cut down and burnt. Now there is　32　 forest left, though there are still some small areas covered with trees. We call these woods.

　　Elephants, tigers and many　33　 animals were living in the thick forest. When people came to live in Hong Kong, the　34　 began to die out. Early farmers grew rice and　35　 pigs and chickens in the valleys. They cut down the trees and burnt them. They needed　36　 to keep themselves warm in winter, to cook their food and to keep away the dangerous animals. Elephants quickly disappeared because there was not enough food for them. 　37　 did most of the wolves and tigers. Monkeys and many other animals soon　38　 in the same way.

　　You might think that there are no longer any animals in Hong Kong　39　 in the zoos. But there are still about 36 different animals　40　 there. One of the most interesting of Hong Kong's animals is the barking deer. These are beautiful little animals　41　 a rich brown coat and a white patch (补丁) under the tail. They look like deer but they are much smaller. They are less than two feet　42　. They make a noise rather like a dog　43　. In Hong Kong the barking deer has only a real enemy--　44　. People hunt these little animals though it is illegal (违法的). There are now not many barking deer left. So it is important　45　 people to protect wild animals.