Faces, like fingerprints, are【C1】______Did you ever wonder how it is possible for us to recognize people？ Even a【C2】______writer probably could not describe all the features that make one face different from another. Yet a very young child— or even an animal,【C3】______a pigeon — can learn to【C4】______faces. We all take this【C5】______for granted. We also tell people apart by【C6】______they behave. When we talk about someones person-ality, we mean the ways【C7】______which he or she acts, speaks, thinks and feels【C8】______make that individual different from others. 【C9】______the human face, human personality is very complex. But describing someones 【C10】______in words is somewhat easier than describing his face. If you were asked to describe what a "nice face" looked like, you probably would have a【C11】______time doing so. But if you were asked to describe a "nice【C12】______", you might begin to think about someone who was kind, considerate, friendly, warm, and so forth. There are many words to describe how a person thinks, feels and acts. Gordon Allports, an American psychologist, found nearly 18,000 English words【C13】______differences in peoples behavior. And many of us use this information as a basis for describing, or typing, his personality. Bookworms, conservatives, military types—people【C14】______with such terms. People have always tried to "type" each other. Actors in early Greek drama wore【C15】______to show the audience【C16】______they played the villains or the heros role.【C17】______the words "person" and "personality" come from the Latin persona, meaning "mask". Today, most television and movie actors do not wear masks. But we can【C18】______tell the "good guys"【C19】______the "bad guys" because the two types differ in【C20】______as well as in actions.
【C1】

A. unusual
B. extraordinary
C. uncommon
D. unique