Many animals use some kinds of language .They use signals (信号) and the signals have meaning , For example, When a bee has found some food , it goes 21 its home .It is 22 for a bee to tell 23 bees where the food is by speaking to 24 ,but it can do a little dancing .This tells the bees where the food is and 25 it is . Some animals show how they feel by making sounds . It is not difficult to tell that a dog barks (吠) 26 it is angry .Birds make several different sounds .and 27 has its own meaning . Sometimes we humans make sounds , 28 we make sounds like OH or OUCH to show we feel about something or when we 29 something on our feet. We humans have languages. We have words .These words have the meaning of things actions (行动)，feeling or ideas .We are able to give each other information by writing down words .in this way , we can 30 what has happened or send the messages to people far away. 小题1: A．out of B．on with C．away from D．back to 小题2: A．important B．difficult C．unnecessary D．impossible 小题3: A．each other B．another C．the other D．others 小题4: A．it B．him C．them D．themselves 小题5: A．how long B．how far away C．how many D．how old . 小题6: A．so that B．before C．until D．because 小题7: A．each B．every C．all D．some 小题8:A.In the same sound     B by the different sound C.In the same way      D.By the different way 小题9: A．put B．drope C．fell D．set 小题10: A．speak B．remember C．know D．understand.