题目内容：

Most people use their mouths to talk, but do you know same people use their hands to speak? Some people who cannot hear use their hands to communicate messages to others. This is called sign language. These people make shapes with their fingers, movements with their hands, as well as different faces in order to talk to other people.

One way people speak with their hands is by making shapes for letters with their fingers. For example, if you make an "OK" sign with your thumb and finger, that is the shape for the letter "f" in American sign language. Each letter has a hand shape. This way people can spell words using their hands. For example, if you want to spell "fun", you need to make three shapes. First you make the shape for the letter "f", then the shape for the letter "u", and then the shape for the letter "n".

___________. If you move your hand from your nose to your chin(下巴), you can say“mother” in American sign language. Of course, you have to use the correct hand shape, too. That shape is like holding your hand open with all five fingers showing. If you move your hand from the top of your head to your chin, you can say "father＂， Again, you have to use the same hand shape that you used for "mother".

Finally, people can change their faces to communicate in a sign language. For example, if you want to ask a question, you need to make your eyebrows (眉毛) go up. You also need to move your head forward a little.

If you want to say "I do not know", you need to make your eyes smaller and make your eyebrows go down.

1.If you want to spell the word "nice", you need to make _______ hand shapes.

A. one

B. two

C. three

D. four

2.Which of the following can be put in the blank in Paragraph 3?

A. People also need to learn sign language

B. People also make hand shapes to communicate

C. People also move their hands to talk in a sign language

D. People also make different faces to express their meanings

3.You need to use your _______ to say "I do not know" in American sign language.

A. eyes and eyebrows

B. eyes and head

C. hand and head

D. fingers and eyes

4.The purpose of the passage is to _________.

A. help people know more about America

B. introduce American sign language to readers

C. teach readers how to make hand shapes

D. encourage people to use more sign language