Eye behavior, involving varieties of eye-contact, can give subtlemessages which people pick up in their daily life. Warm looks or coldstares tell more than words can. Meeting or failing to meet anotherperson’s eye produce a particular effect. When two Americans look 63. ______.searchingly at each other’s eye, emotions are heightened and the 64. ______.relationship becomes closer. However, Americans are careful about where 65. ______.and when to meet other’s eye. In our normal conversation, each eyecontact 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 66. ______.generate a special kind of human-to-human awareness. For instance, bysimply using his eyes. a man can make a woman aware of him comfortablyor uncomfortably; a long and steady gaze from a policeman or judge 67. ______.intimidates accused. In the U.S. proper street behavior requires a nicebalance of attention and inattention. You are supposed to look at a passer- 68. ______.by just enough to show that you are being aware of his presence. If youlook too little, you appear haughty; too much, inquisitive. Much eye 69. ______.behavior is such subtle that our reaction to it is largely instinctive.Besides, the codes of eye behavior vary dramatically from one culture to 70. ______.other. In the Middle east, it is impolite to look at other person all the timeduring a conversation; in England, the polite listener fixes the speaker 71. ______.with an inattentive stare and blinks eyes occasionally as a sign of interestand attention. In America, eye behavior functions as a kind of 72. ______.conversational traffic signal control the talking pace and time, and toindicate a change of topic. If you can understand this vital mechanism ofinterpersonal relations, the basic American idiom is there. 70（）