【正文】
ce. At the North Pole there is only snow, ice and water. There is not any land. You cannot see the polar bear in the snow because its coat is yellowwhite. It has a very warm coat because the weather is cold of the Arctic Circle. The bear is 3 m long and it weighs 450 kilos. It can stand up on its back legs because it has very wide feet. It can use its front legs like arms. The polar bear can swim very well. It can swim 120 kilometers out into the water. It catches fish and sea animals for food. It goes into the sea when it is afraid. People like to kill the polar bear for its beautiful white coat. The governments of Canada and United States say that no one can kill polar bears now. They do not want all of these beautiful animals to die. ( ) 1 The polar bear lives inside the Arctic Circle near ___________ . A. the South Pole B. the North Pole C . the ice D. the snow ( ) 2. You can’t see the polar bear because ___________ . A. The snow is white B. the water is cold C. it has a warm coat D. it is yellowwhite ( ) polar bear can use its ___________ like arms . A . back legs B. wide feet C. front legs D. big hand ( ) is true ? A. The polar bear is a good swimmer. B. The polar bear only eats fish. C. The polar bear goes out of the sea when it is afraid. D. The polar bear can swim 120 meters out into the water. ( ) 5. ___________ so no one can kill the polar bears A. They have no beautiful coats B. They are too friendly to people C. They are too heavy D. The governments do not want all of them to die. ( C ) Dogs are friends of man. They work for us. They hunt with us. They also play with us. But a long time ago, all over the world, dogs were wild. Dogs can go back to the Stone Age. All dogs had the same ancestor (祖先 ). It is believed that this ancestor was much like a wolf. Other animals, like fox, also came from this ancestor. Thousands of years ago, man began to tame (使馴服 ) the wild dogs. When the dogs were tamed, they were trained well. The strong dogs then became working animals. They were trained to pull heavy loads (擔(dān)子 ). They learned to keep watching over sheep and other animals. Working dogs could do other things, too. Some dogs were not strong. But they could help man hunt. Other dogs were best at pets. At first, there were only a few kinds of dogs. Today, there are more than 100 kinds. ( ) word “wild” in the first paragraph means ___. A. 溫順的 B. 野生的 C. 兇殘的 D. 善良的 ( ) 2. Dogs can go back to the Stone Age. Here “