《2025年新课程助学丛书英语八年级上册人教版》

B
Dolphins are really interesting animals in the ocean. They are smart, love to play, and are very friendly. These animals live in groups. The group is called a pod(一小群).
Dolphins have a smooth(光滑的) and rubbery(橡胶般的) body. This helps them swim very fast in the water. They have a special way to find food and know where they are going. They make high - pitched(高音调的) sounds. Then they listen to the sounds that come back. This way, they can tell where things are, how big they are, and what shape they are, even when it's dark or the water is not clear.
Dolphins eat meat. Their favorite food is fish and squid(鱿鱼). They work together to catch food. In a pod, dolphins will drive fish together. Then it's easy for them to catch the fish.
Dolphins can talk to each other in many ways. They make clicks, whistles(口哨声), and use their body to show what they mean. Different sounds can tell others different things, like if there is danger, or where to find food.
Now, let's look at the following table about dolphins' sounds and their meanings.

(C) 36. What can we know about dolphins' body?
A. It's rough to touch.
B. It helps them swim slowly.
C. Its smoothness helps them swim very fast.
D. It's hard like a rock.
(B) 37. Why do dolphins live in groups?
A. To have more fun.
B. To hunt for food more easily.
C. To keep warm in winter.
D. To fight against other animals.
(C) 38. Which of the following is TRUE about dolphins' communication?
A. They only make one kind of sound.
B. Their body language has no meaning.
C. Different sounds have different meanings.
D. They can't tell danger from sounds.
(B) 39. According to the table, if a dolphin wants to find a partner, it may make ________.
A. clicks
B. whistles
C. both clicks and whistles
D. neither clicks nor whistles
(C) 40. In physics, when light bounces off a mirror, it's a similar phenomenon to dolphins using ________ to sense their surroundings.
A. body language
B. high - pitched voices
C. echolocation(回声定位)
D. group cooperation

答案： 36—40 CBCBC