I. Underline the object clauses in the text.
Communication
You speak, write a letter"and"make telephone calls. Your words carry a message. People communicate with words. But do you think that you can communicate without words? A smile on your face shows that you are happy"and"friendly. Tears in your eyes tell others that you are sad. When you raise your hand in class, the teacher knows that you want to say something or ask a question. You shake your head,"and"people know that you are saying “No”. You nod,"and"people know that you are saying “Yes”. Other things can also carry messages. For example, a sign at the bus stop helps you to know which bus to take. Signs on doors tell you whether to go in or out. Have you noticed that there are a lot of signs around you,"and"that you receive messages from them all the time?
Books, magazines, TV, radio"and"films all help us communicate with others. They help us know what is going on in the world"and"what other people are thinking about.