Directions: Complete the following passages by using the words in the box. Each word can only be used once. Note that there is one word more than you need.

Hundreds of years ago, Charles Darwin predicted that facial expressions of emotion are 【小题1】. If you’ve ever seen an episode of the popular US TV drama Lie To Me, you will really understand facial expressions. The leading actor of the show, Dr. Cal Lightman has spent 20 years studying nonverbal communication and facial expressions, which allows him to point out other people’s studying nonverbal communication and facial expressions which allows him to point out other people’s 【小题2】 and on many occasions, to be skilled at tricking in order to get the truth.

Is there really much truth behind this science of 【小题3】 human emotions through expressions? Paul Ekman, a(n) 【小题4】 psychologist whose work focuses on mapping facial expressions, is Lie To Me’s scientific advisor and the following are some of his explanations.

Hand-to-face gesture indicates a lie.

Each micro-expression is unique to 【小题5】 specific emotions because the person is often unaware of doing it. But it doesn’t necessarily mean that they are lying when someone uses a hand to hide part of his face. The person could be holding back information but you may better consider looking at other more important clues rather than just the simple hand-to-face gesture.

A liar refuses eye contact.

People look away when they are thinking carefully and considering each word before it is spoken, not just when they are 【小题6】 an excuse. Oblique eyebrows are a very reliable 【小题7】of sadness and few people can make this 【小题8】 expression, so it is actually never faked.

Guilty knowledge technique is 【小题9】.

Lightman often uses the guilty knowledge technique, mentioning something that only the guilty person will know about and show a(n)【小题10】. This is often used in polygraph exams: “Was the person strangled, shot or stabbed to death?” Only the killer knows and is likely to respond physiologically when the actual weapon is mentioned.