You speak, write a letter, make a telephone. Your words carry a m    . People communicate(交流) with words. Do you think you can communicate w    words? A smile on your face s  you are happy or friendly. Tears in your eyes tell others that you are sad.
When you p     up your hands in class, the teacher knows you want to say something or ask questions. You shake your head, and people know you are saying “No”. You n     and people know you are saying “Yes”. Other things can also carry messages. For e    , a sign at the bus stop helps you to know which bus to take. A sign on the door h     you where to go in or out. Have you ever thought that there are a lot of signs around you and that you receive(接收) messages from them all the time? People can communicate in many other ways. An a     can use his drawing to tell beautiful mountains(山), about the blue sea and many other things. Books are written to tell about all the w   things in the world and also about people and their ideas. Books, m    , TV, radio and films all help us communicate with others. They can help us to know what is going on in the world and what others are thinking about.