Human， fall， love， excite， sell， danger， slow， with， teach， ill

Animals are the closest friends to us in the world． It's important to learn things about protecting animals． Some of them are big and（1）　　． People should keep away from them． But now they are also calling for help．

    First， when we come to the Chengdu Research Base，we can see the cute and（2）　　baby pandas．When the babies see the keepers，they run over with（3）　　 and some of them even walk into their friends and fall over! Pandas don't have babies very often， and some of the babies only live for a short time because of（4）　　． Adult pandas spend over 12 hours a day eating about 10 kilos of bamboo． Many years ago， there were a lot more bamboo forests and pandas in China，but then （5）　　 started to cut down the forests． So pandas have fewer places to live．Scientists say there are now fewer than 2，000 pandas living in the forests．A program in Chengdu（6）　　 children about why pandas are endangered．We all hope in the future there will be a lot more pandas than now．

    Second， let's take a look at the sharks． Maybe we have heard of shark fin soup． This famous and expensive dish is especially popular in southern China． But do you realize that you're killing a whole shark each time you enjoy a bowl of shark fin soup？

    When people catch sharks， they cut off their fins and throw the sharks back into the ocean． This is not only cruel，but also harmful to the environment． （7）　a fin，a shark can no longer swim． And it's hard to get food， too． Then it（8）　 dies．   Sharks are at the top of the food chain in the ocean's ecosystem． Many believe sharks can never be endangered． But in fact， around 70 million sharks are caught and traded in this industry every year． The numbers of some kinds of sharks（9）　　 by over 90 percent several years ago．Environmental protection groups around the world have even asked governments to develop laws to stop the（10）　　 of shark fins．So far，no scientific studies have shown shark fins are good for health， so why eat them？