Eye behavior can give subtle messages which people pick up in their daily life. It tells more than words can. Meeting or failing to meet another person's eyes produce a particular effect.When two Americans __1__ look searchingly at each other's eye, emotions are __2__ heightened and the relationship becomes closer. However, Americans are careful about where and when to __3__ meet other's eye. In our normal conversation, each eye-contract lasts only a few seconds before one or both individuals look away, because the longer meeting of the eyes is rare, and, after it happens, can generate __4__ a special kind of human-to-human awareness. For instance,by simple using his eyes, a man can make a woman aware of him comfortably or uncomfortably; a long and steady gaze from a policeman or judge intimidates accused. __5__ In the U.S., proper street behavior requires a nice balance of attention and inattention. You are supposed to look at a passer-by just enough to show that you are being aware of his presence. If you look too little, __6__ you appear haughty; too much, inquisitive. Much eye behavior is such subtle that our reaction to it is __7__ largely instinctive. Besides, the codes of eye behavior vary dramatically from one culture to other. In the __8__ Middle East, it is impolite to look at the other person all the time during a conversation; in England, the polite listener fixes the speaker with an inattentive __9__ stare and blinks eye occasionally as a sign of interest and attention. In America, eye behavior functions as a kind of conversational traffic signal control the __10__ talking pace and time, and to indicate a change of topic.
本句中两个主语meeting和failing to meet another person's eye 用or连接，这时谓语动词应该采取就近原则，与最相邻的主语一致。
此处的动作应该是look into（注视），而不是一般的“看”（look at）。
表示不定指代的“一个或者另一个”应该用one and/or another。