17．People lie all the time，but depending on how skilled they are，it can be difficult to determine when someone is lying to you．Do you know how to recognize the signs that someone is lying to you？Some of the signs are obvious while others are more subliminal（难以察觉的），but there are ways to catch someone in a lie，you just need to know what they are．（36）B
（1）Liars make false eye contact．
A person who is lying to you won't make eye contact with you or they make too much eye contact．If a person is lying they may feel you are watching him and he will look down at the floor or away from your eyes．Some people try to stare you in the face deliberately．（37）G
（2）Liars avoid using contractions（缩略形式）
The liar will say"I did NOT notice that．"instead of"I didn't notice that．"（38）A．Usually it ends up making the story a lot less believable．
（3）Unnatural Body Language．
Liars often feel uneasy，turn away from the person to whom they are speaking，blink（眨眼） rapidly，smile less and have pitch changes in their tone of voice．They may cross their arms which is a sign of being"closed"or trying not to reveal too much information．（39）C．They could touch parts of their face，an ear or a nose or play with keys or another item that they have in their hand．
（4）Liars provide additional information without being asked for it
（40）EThe result is the more complicated the story is，the less believable it will be．You will have the feeling that nothing could be further from the truth．
A．This is an attempt by the liar to be absolutely clear what they mean．
B．Here are some easy ways to recognize liars and catch lies．
C．Sometimes people look unnatural when they are lying
D．They will get angry if you doubt their story
E．They seem to think that by telling their story in detail，you will find it more believable．
F．They try to change the subject or move the conversation in a different direction
G．In this way they feel like making eye contact will make what they are saying more believable．
