师：Okay, ashes in case I knew. Alright, let's begin. Done. Good afternoon, everyone.
生：Good afternoon.
师：Michelle. Sit down, please. Okay, just now we watched a video together about the Seaworld. What can we see in the sea world?
生：Fishes.
师：Yeah, we can talk about what kind of fish. Today we're going to learn about one of them. Look, this is the head, this is the tail, and in the middle is the body. And we can also see some features on the face. This is a shark. What do you think of sharks? Can you give us some words to describe it? Go ahead and try. You please.
生：I think sharks are dangerous.
师：Yeah, dangerous. What else? You please.
生：I think they are strong and...
生：Scary.
师：Yeah, they are strong and scary. We usually use such words to describe sharks, right? Do you think they are at the top of the food chain? Look at the picture. We can see that sharks are at the top in the sea. But I have a question. If it's not just in the sea, but in the whole ecosystem, are the sharks still at the top? No. Think about it. Now, let's play a game. To find out the answer, you need to put the pictures in the right place to make a complete picture of a shark. Are you clear? I need a volunteer to come here. Who would like to try?
生：Me.
师：Give her a big hand. A good job. Now we can see this is a shark, but this shark looks a little different. It has no face. So why does the shark have no face? Look at this page. What is happening to sharks now? We need to read the passage and find out the answer. Please turn to page 99. Read the passage quickly and find out the answer to the question: why do so many sharks lose their fins? You have one minute. Start.
（一分钟后）
师：Time's up. Who would like to answer the question? Any volunteer? You please.
生：Because people kill sharks to make shark fin soup.
师：Okay, thank you. Very smart. It's because people kill the sharks for their fins and use the fins to make soup. Now let's come back to the question, who is really at the top of the food chain? Now I know it's not the sharks, but us humans. Why? Because humans eat sharks. Now let's learn about the structure of the passage. You have one minute to read the passage and match the main idea of each paragraph. You can find the keywords to help you. Have you finished? You please.
生：Introduction of...
师：Wow, brilliant. Do you agree with her? Now we've learned about the structure of the passage. To get more information, we need to read the passage carefully. Now let's go to paragraph 1 and look at "shark fin soup". What information can we get?
生：Shark fins can be used to make soup.
师：Do you think it's easy to get shark fins?
生：No.
师：So maybe the soup is very expensive. Expensive. And we have this word "famous". Many have heard of it. That means the soup is very famous. Because the soup is expensive and famous, and people want to make more money, they will kill sharks for their fins. Now, how do they get the fins and what will happen to sharks without fins? You have two minutes to read paragraph 2 and find the answers. Start.
（两分钟后）
师：Time's up. For the first question, I need a volunteer to come here and move the words and pictures to show us the process of getting shark fins. Are you clear? When you're moving the words, I hope you can give us a brief introduction. Who wants to be the volunteer? You please.
生：I think people first catch sharks, then cut off their fins, and finally throw the sharks back into the ocean.
师：Wow, so brilliant. Now, are you clear about the process? I have a question. What will happen to the sharks without fins? Who can answer the question? You please.
生：A shark can no longer swim and slowly dies.
师：Yeah, without fins, they cannot swim and slowly die. What do you think of this process for sharks? Use a word.
生：Cruel.
师：And how about the influence on the environment? You can also use a word from our textbook.
生：Harmful.
师：Why is it harmful to the environment? I hope you can find some keywords to fill in the blanks. You still have one minute.
（一分钟后）
师：Have you finished? When I invite... Your turn.
生：Sharks are at the top of the food chain in the ocean ecosystem. If their numbers drop too low, it will bring danger to all ocean life.
师：Okay, well done. Thank you. Now here is another question. Why will the decline of sharks bring danger to all ocean life? You have one minute to discuss the problem with your group members. Start.
（一分钟后）
师：Have you found the answers? Who would like to be the volunteers to answer the question? You please.
生：Many may have heard of shark fin soup, but do you realize that you are killing a whole shark each time you enjoy a bowl of it? 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. In fact, about 70 million sharks are caught and traded in the industry every year. The numbers of some kinds of sharks have fallen by over 90% in the past 20 - 30 years.