Many animals use some kinds of "languages" They use signals to show 1 meanings.

    For example, when a bee 2 some food, it will go back to its home. It's not 3 for a bee to tell other bees where the food is by speaking to them. But it can 4 a little dancing. This tells the other bees where the food is and how 5 it is.

    Some animals show how they 6 by making sounds. It is not difficult to tell. 7 a dog is angry or happy when it barks.

    Birds make several different sounds and 8 has its own meaning.

    Sometimes people make sounds in the same way. We make a sound like "Oh" when we drop something on our feet.

    We have languages. Our words have the meanings of things, actions, feelings and ideas. We are able to give each other information.

These clothes are too big too small.

人们一直对动物如何交流很感兴趣，科学家们已就这一课题做了大量研究。