Just as there are many different spoken languages, there are also many different ________ languages. Just like spoken language, the ________ of sign language are various, so people can use them to express all kinds of ideas.

________ words are expressed by a single sign, not spelled letter by letter. As with finger ________, most words are signed with the right hand. Some words are signed with both ________. However, not every word that can be spoken is signed. Little words like “the” ________ in sign language. And the sign language is very interesting. For example, to sign “Thank you”, begin with hand flat（平的）and the fingers near your lips（嘴唇）. Then move your hand forward and down in the direction of the ________ you are thanking.

If you want to know ________ about the sign language, you can get various sign languages in many dictionaries in books and online. With online dictionaries, short videos about the signs make learning ________.

For most people, they think the sign language is not very important because they can ________ each other. For the people with bad hearing, sign language is their first language.