Humans may not be the only ones to use grammar and vocabulary to speak and communicate. Scientists believe dolphins also use words and sentences to speak to each other. We have known for a long time that dolphins can communicate. New research suggests that this communication is similar to the conversations humans have. Scientists say the clicks, whistles and other sounds that dolphins make appear to be sentences that let the sea creatures send messages to each other. The dolphins use their language to identify themselves, have relations with other dolphins and do things together. Scientists say that one day, we may be able to understand dolphin language and talk to dolphins.
Researchers at the Karadag Nature Reserve in Crimea made the discovery that dolphins had their own language after recording two Black Sea bottlenose dolphins(宽吻海豚). The dolphins were named Yasha and Yana. The scientists noticed that one dolphin listened to what the other was saying and then replied. Lead researcher said, "This exchange resembles a conversation between two people." He added, "This language exhibits all the design features present in the human spoken language. This indicates a high level of intelligence and consciousness in dolphins." He said the dolphins' language is a highly developed spoken language, like the human language.
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1.Scientists believe dolphins also use _____ to speak to each other.
A sounds
B words and sentences
C clicks
D whistles
解析：选B。细节理解题。根据第一段第二句Scientists believe dolphins also use words and sentences to speak to each other.可知，故选B。
2.What made the researchers believe that the dolphins have their own language?
A That after recording two Black Sea bottlenose dolphins.
B That the dolphins were named Yasha and Yana.
C That the scientists noticed that one dolphin didn’t listen to what the other was saying.
D That the dolphins can nod their heads.
解析：选A。细节理解题。根据第二段第一句Researchers at the Karadag Nature Reserve in Crimea made the discovery that dolphins had their own language after recording two Black Sea bottlenose dolphins.可知，故选A。
3.We can learn from the passage that ________.
A dolphins are intelligent
B dolphins have a low level of intelligence and consciousness
C dolphins aren’t good at communicating with other dolphins
D dolphins are stupid
解析：选A。细节理解题。根据第二段倒数第二句This indicates a high level of intelligence and consciousness in dolphins.可知，选A。
4.What’s the best title for the passage?
A Dolphin shows are wonderful.
B Dolphins can walk like humans.
C Dolphins are cleverer than humans.
D Dolphins have their own language.
解析：选D。文章标题题。这篇文章主要讲述“海豚也有自己的语言”，故选D。
