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①Humans usually communicate with each other with words. However, sometimes our hands can also show people what we mean. The same thing happens to the apes (猿) as well.

②Apes have their own gestures (手势) to show what they mean. Chimpanzees and bonobos are two kinds of apes that are the closest to humans. In fact, they have up to 80 different gestures to express themselves. Though the two kinds of apes use different signs in some ways, they share over 90% of the same gestures.

③Two researchers wondered whether humans could understand the gestures of apes. They created a game for people to play online. People needed to watch short videos of apes making a gesture and then chose the correct meaning of the gesture out of four possible answers.

④The result surprised the researchers a lot. They found that those people could choose the correct meaning over 50% of the time. For some gestures, they could even choose the correct meaning about 80% of the time. One example was the gesture of wiping the mouth. People could guess it correctly by choosing “give me that food”. And “big loud scratch (抓挠)” means “help pick insects off me”. But how could this happen?

⑤ ▲ . One possibility is that the gestures came from our ancestors, which we shared with the apes. Another possibility is that the gestures are a natural result of having similar body shapes and communicating similar ideas. It’s also possible that the gestures simply look like the actions they are asking for.

⑥It’s necessary to carry out further research to study how humans can understand the gestures of apes. And scientists also wonder how humans understand other animals, like dogs.

1．The researchers create a game online in order to ________.

A．see how many researchers understand the gestures of apes

B．show why people could understand the gesture of apes

C．know if people were able to understand the gesture of apes

D．find out how apes make gestures and communicate with others

2．Which of the following sentence can be put in the ________?

A．However, humans don’t really understand the gestures of apes.

B．Humans and apes have different gestures most of the time.

C．Scientists believe that humans have the natural ability to understand apes.

D．It’s necessary for humans to learn some gestures from the apes.

3．The best title of the passage can be ________.

A．Two Kinds of Apes—Chimpanzees and Bonobos

B．Apes—A Kind of Smarter Animals than Humans

C．Gestures— A Good Way to Understand the Apes

D．Body Language—A Bridge between Animals

4．If we put the passage into four parts, which of the following is the best?
（①＝Para. 1,   ②＝Para. 2,   ③＝Para. 3,   ④＝Para. 4,   ⑤＝Para. 5,   ⑥＝Para. 6）

A．①②; ③; ④⑤; ⑥	B．①②③; ④; ⑤; ⑥
C．①; ②③; ④⑤; ⑥	D．①; ②; ③④⑤; ⑥