Section 1
Questions 1-8
Complete the sentences below.
Write NO MORE THAN ONE WORD for each answer.
The video shows chimpanzees using sign language to talk to one another, people and
Since the videos appear dated, a student questions whether scientists currently perform similar
The professor admits that the examples in the videos are ones.
A student did not expect that chimpanzees would be so with human language.
Recent research found that chimpanzees used sign language to communicate in the
It is mentioned that the way people control their vocal cords, , teeth and lips is unique to humans.
The use of a voice is not a in all human languages.
Unless they are by humans, chimpanzee sign language is very simple.