The eyes are one of the most expressive instruments of body language．Keith, seventeen, from Montclair New Jersey, leamed the hard way about one 1 the eyes can make．“I had a 2 who graded heavily on classroom discussion, ”Keith says．“He seemed to have a strong 3 to know just when I didn't have the 4 ．I couldn't figure out how he could be so 5 ．Then it dawned on me．Whenever I didn't know the answer, I would 6 looking at him．When I did know what to say, I always 7 straight back at him．From that moment on, I 8 myself to look him in the eye, 9 I knew the work or not．That trick has 10 me a lot of trouble．”
Many people, including some policemen, believe eye contact is a good 11 of honesty．If someone can't look you directly in the eye, then he or she is not playing 12 , they insist．After many experiments, however, however, a number of experts have found out that good liars can make 13 eye contact．Eye contact, though not a 14 sign of dishonesty, is a clear way to show interest in another person．When a person looks at you and 15 to do so, you know his 16 is placed on yon．When he turns his head away, his mind is probably 17 ．But there are exceptions．A 18 person may have trouble making and keeping eye contact, no matter how interested he is in the other person．And certain 19 , such as the British and Germans, are much 20 oriented (适应) to eyeball-to-eyeball contact than, say, the French and the Arabs．