B
Dolphins are very smart and friendly animals. They live in the sea. Dolphins love to play and swim together. To live together happily, they need to "talk" to each other. So, how do dolphins talk with each other? They don't use words like we do. Instead, dolphins use different sounds and body movements to share information.
First, they make clicking sounds(滴答声). These clicks are very useful. They help dolphins "see" with their ears in dark or dirty water. When the clicks hit something like a fish or a rock, the sound comes back to the dolphin. This amazing skill helps them find food and keep away from danger.
Second, dolphins make whistling sounds. This is the most exciting part. Every dolphin has its own special whistle when it is a baby. This whistle is like a name. They use these whistles to call their friends and family.
Third, they use body language. Dolphins are very active. They talk by jumping, or slapping their tails on the water. A loud tail slap can be a warning sign for danger. They also touch each other gently with their fins(鳍).
Scientists are still learning about the dolphin's secret language. Sadly, human activities lead to some problems. The ocean is becoming noisier because of ships and machines. This noise pollution makes it difficult for dolphins to hear each other clearly. It's like trying to talk to your friend at a very loud party.
We need to protect our oceans. We must keep the ocean clean and quiet for these amazing animals. They are calling out to us, and it's time for us to listen.
() 5. What are the three main ways dolphins use to talk with each other?
A. Songs, dances and soft touches.
B. Fins, slapping tails and jumps.
C. Clicks, whistles and body movements.
D. Eyes, nose and body movements.
() 6. What does the skill of making clicking sounds help dolphins do?
A. It can be a warning sign for danger.
B. It helps them feel close to each other.
C. It helps them call their friends and family.
D. It helps them find food and keep away from danger.
() 7. What is the main purpose of the last two paragraphs?
A. To describe how smart dolphins are.
B. To explain how dolphins use body language.
C. To give more examples of dolphin sounds.
D. To discuss the problems dolphins face and call for protection.
() 8. What's the structure of the passage? (①=paragraph 1, ②=paragraph 2...)