Which of the following statement is true?____. A: The ability to use language separates human beings B: We can be certain that animals have a culture too C: Social scientists doubt if animals have a culture too D: Some traditional ideas about the difference between human beings and animals may be wrong

Focusing on the Main Ideas ▇　Choose the best answer to complete each of the following sentences according to the information contained in the listening passage. 1. The speaker wants us human beings to think about why ______________.

The conclusion of this article is that ______. A: communication between human beings is usually dull B: the smallest words are best in effective communication C: communication without body language would be dull D: words are not important in communication

2. Why do human beings have a larger brain compared to chimpanzees? A: Human beings always had a big brain that helped us to survive. B: Human beings have a bigger brain by cooking food over the fire. C: Human being have a bigger brain through the evolutionary process. D: Human beings have a bigger brain through eating fruits and berries. E: Human beings have a bigger brain through migration.

Nowadays, human beings have changed from traditional biomedical model to biological, psychological and social medical model.