Can dolphins talk? Maybe they can't talk with words, but they talk with sounds.

Dolphins travel in a group. We call a group of fish a "school". They don't study but they travel together. Dolphins are mammals（哺乳动物）, not fish; but they swim together in a school.

Dolphins talk to other dolphins in the school. The give information.

They tell when they are happy or sad or afraid. They say welcome when a dolphin comes back to school. They talk when they play.

They make a few sounds above water. They make many more sounds under water. People can't hear these sounds because they are very high. Scientists make tapes of the sounds and study them.

【小题1】Can dolphins talk with words?
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【小题2】How do dolphins travel?
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【小题3】What do we call a group of fish?
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【小题4】Are dolphins mammals or fish?
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【小题5】Why can't people hear the sounds made by dolphins?
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【小题6】What do you think of dolphins?
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