Questions 11 to 18 are based on the conversation you have just heard.

单项选择题Which of the following statements about emotions is NOT TRUE

单项选择题Why do the researchers try to classify emotions

单项选择题What are the elements that produce human emotions

单项选择题The passage indicates that individual emotions ______.

单项选择题The two examples given in the third paragraph shows that ______.

单项选择题Some environmentalists warn that the soaring population will cause ______.

单项选择题The example in paragraph 8 indicated that ______.

单项选择题Researchers state that ______.

单项选择题Biologists report that the biodiversity is decreasing because ______.

单项选择题The passage mainly tells us that ______.