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Some animals "say" things by making sound. A dog barks, for example, when a stranger comes near. A cat purrs when it is pleased. Some birds make several different sounds, each with its own meaning. Sometimes we human beings speak in the same way. We make sound like "Oh" or "Ah" when we are frightened or pleased or when we drop something on our toes. ( )31. A rabbit uses its tail to ________. A. warn other rabbits when they are in danger B. tell other rabbits where food is C. make itself look fierce D. help it to run fast ( )32. When a cobra is angry, it ________. A. makes a loud noise B. raises its head C. moves up and down D. does a little dance ( )33. Several different sounds can be made by a ________. A. rabbit B. bee C. bird D. fish ( )34. From the passage, we know that ______ use words and sentences to express ideas and thoughts. A. all living things B. all animals C. some birds D. human beings B Do you think of white when someone talks about a polar (北极)bear? In fact, the polar bear does not have white fur. It just appears to be white. Polar bears have a very good sense of smell. It helps them to find food. During summer, polar bears sleep longer, because they are able to find their food more easily at night. Usually, after a meal, polar bears have a short sleep. A polar bear can have 2-3 babies at a time. They live with their mothers until they are about two and a half years old. However, polar bears will die out soon because o f people. There are only 20,000 to 25,000 polar bears in the world. The ones that are left are trying to survive today. The number of polar bears is becoming smaller and smaller because of the loss of sea ice— polar bears mostly inhabit (居住于) the sea ice, not the land ice. This is happening because of global warming (全球气候变暖), pollution, hunting and so on. Ordinary people don't care, but great people have the power and want to save tigers, fight for giant pandas and save polar bears. Ordinary people will wait, but great people will find a new world. For me, I will not wait. I will take the bus more often fr om now on. Join me and save the polar be ars, and of course, the tigers, the giant pandas and... ( )35. According to the passage, which of these answers does NOT make sea ice less? A. Global warming. B. Pollution. C. Hunting. D. Travelling. ( )36. What does the word "ordinary" mean in Chinese? A. 勤劳的 B. 聪慧的 C. 普通的 D. 坚强的 ( )37. What is the main idea of this passage? A. To show that the number of polar bears is getting smaller. B. To tell people that polar bears will soon have nowhere to live. C. To let people know why polar bears are in danger. D. To talk about polar bears and suggest that people protect animals. ( )38. Where can this passage come from? A. A magazine about animals. B. A book about greetings. C. A poster about working plans. D. An instruction book. C (责任编辑：admin) |