Faces,like fingerprints,are unique.Did you ever wonder how it is possible for us to (1) other people?Even a skilled writer probably could not describe all the features that make one face (2) from another. Yet a very young child—or even an animal,such as a pigeon—can learn to recognize faces. We all (3 )this ability for granted. We also( 4) people apart by how they behave. When we talk about someone's (5 ),we mean the way( 6) he or she acts,speaks,thinks and feels that makes that individual different from others. (7) the human face,human personality is very complex. But describing someone's personality in words is somewhat easier than describing his face. If you were asked to describe( 8 )a“nice face”looked like,you probably would have a difficult time doing so. But if you (9) to describe a“nice person”now,you might begin to think about someone who was kind, (10) ,friendly,warm,and so forth.