14. Where did Gabriela Mistral start her teaching career?

　　15. How did Gabriela Mistral help the poor children of her hometown?

　　16. Why did many countries think highly of Gabriela Mistral?

　　17. How did Gabriela Mistral become famous all over the world?

　　Passage 3

　　Over time animals have developed many ways to stay away from predators. A predator is an animal that hunts and eats other animals. Hiding is one of the best ways to stay alive. Some animals hide by looking like the places where they live. To see how this works, let's look at the sea dragon. It is a master of disguise. The sea dragon is covered with skin that looks like leaves. The skin helps the dragon look like a piece of seaweed. A hungry meat eater would stay away from anything that looks like seaweed. Other animals stay safe by showing their colors. They want other animals to see them. Scientists call these bright colors--warning colors. You have probably seen animals that have warning colors. Some grasshoppers show off their own bright colors. Those colors don't just look attractive; they tell their enemies to stay away. Of course, hungry predators sometimes ignore the warning. They still go after the grasshopper. If that happens, the grasshopper has a backup defense. It makes lots of foam. The foam tastes so bad that the predator won't do it again. Color doesn't offer enough protection for some other animals. They have different defenses that help them survive in the wild. Many fish live in groups or schools. That's because there is safety in numbers. At the first sign of trouble, schooling fish swim as close together as they can get. Then the school of fish makes lots of twists and turns. All that movement makes it hard for predators to see individuals in a large group.

　　18. What is the speaker mainly talking about?

　　19. What protects the sea dragon from the meat eater's attack?

　　20. According to the passage, why do many fish stay in groups?

以上是针大学英语六级考试听力提供的历年听力真题，供大家参考，更多考试相关的复习指导资料，欢迎继续查看网站。预祝大家考试顺利，一次通过。

编辑推荐：

英语六级考试阅读和听力部分过级经验大分享

英语六级考试备考：怎样提高英语六级听力？

备战2011年英语六级考试听力辅导简介

上一页  [1] [2]