阅读短文，按要求完成各题。
If the eyes are the windows of the soul, then the body is the mirror of our feelings. If we are feeling great, we may give our body signals(信号). If we look at someone else’s body, we can often tell how thy are feeling by their body signals. So reading body language signals is a great tool in daily communication.
In case(假使) you don’t think that learning how to read and use body language is important, here are some numbers for you. 7% of the information we receive is from what people actually say, and 38% of the information we receive is from the tone(语气) and the speed of their voice; while 55% of the information we receive is from their body language.
These non-verbal(非语言的) signals will help you a lot, but you still need to focus on what people are saying. If you focus too much on their body language signals, you and the person may feel uncomfortable. It is useful to be able to read people’s body language, but it is useful to learn how to send the right signals and avoid the wrong signals too. Body language may be given several interpretations. Many signals have different meanings, depending on the person and the situation. Be sure of it when you are trying to read a body language signal.
Facial expression is one of the body languages. Facial expressions are one or more movements on a person’s face, such as frowning(皱眉)，raising your eyebrows and rolling(旋转) your eyes. Scientists say that humans have 80 muscles(肌肉) on their faces. These muscles can make 7.000 different facial expressions. These expressions can be put into six classes. They are happiness, sadness, anger, surprise, fear and disgust(厌恶)。
For example, when people think a certain food tastes disgusting, they usually make a funny face. When people are surprised, they often raise their eyebrows and open their eyes wide.
If people can read facial expressions correctly, they may be better at knowing other people’s feelings. That can help people make more friends. However, sometimes people have to be careful when reading others’ faces. It’s rude to stare at others for a long time.
根据短文内容完成句子（每空限填一个单词）。
From the first paragraph of the passage, we know that          your eyes         your body language signals are great tools in daily communication.
根据短文内容完成句子（每空限填一个单词）。
From the second paragraph of the passage, the numbers mentioned are to show the       
         body language.
根据短文回答问题。
According to the passage, how many classes of facial expressions do you know? What are they?                       
                                                                       
把短文中画底线的句子译成汉语。
                                                                        
根据短文内容用一个完整的英文句子（限10词以内）回答问题。
What is the writer’s opinion on the body language?