There is a common（1） language popular in every country in the world. All the people, old and young, men and women, must use it.

　　It's everybody's second language. It's easy to learn, though（2） you don't hear it. It's sign language（3）.

　　When you wave to a friend, you are using sign language. When you smile at someone, you mean to be friendly. When you put up your hand in class, you are saying, "Please ask me. I know the correct answer." When you put your finger in front of your mouth, you mean "Be quiet." The deaf use sign language to talk to each other. There is even a university for the deaf in the United States. There are also TV programmes for the deaf people. They use sign language to tell everybody.

　　Notes:

　　（1）common/`kmn/adj. 共同的

　　（2）though/u/ conj. 盡管

　　（3）sign language  手勢語

　　（4）wave/weIv/ v. 揮手

　　1.E_______uses sign language.

　　2.Sign language is not d_______, so we can learn it.

　　3.Most people who can s_______use sign language, too.

　　4.If someone smiles at you, it means he/she is friendly t_______you.

　　5.If you can a_______a question, you should put up your hand first.

　　6.You put your finger in front of your mouth if you want someone not to s_______anything.

　　7.The deaf can talk to each other w_______sign language.

　　8.Some A_______deaf people can learn sign language in the university.

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