Questions 8 to 9 are based on the following news. At the end of the news item, you will be given 10 seconds to answer each question. Now listen to the news.

A．Big scientific scandals once in a while.
B．Small infractions all the time.
C．Unreliable research data in papers.
D．Lack of originality in research papers.

A．people might have different expressions for the same emotion
B．pleasant feelings often stimulate Duchenne smile
C．crow’s feet wrinkles often accompanied the Duchenne smile
D．keeping a stiff upper lip was useful for handling stress