Whether the eyes are "the windows of the soul" is debatable; they are intensely important in interpersonal communication is a __1__ fact. During the first two months of a baby's life, the stimuli that __2__ produces a smile is a pair of eyes. The eyes need not to be real: a __3__ mask with two dots will produce a smile. Significantly, a real human　face with eyes covered will not motivate a smile, or will the sight of __4__ only one eye when the face is presented on profile. This attraction to __5__ eyes opposed to the nose or mouth continues as the baby matures. __6__ In one study, when American four-year-old were asked to draw __7__ people, 75 percent of them drew people with mouths, and 99 percent __8__ of them drew people with eyes. In Japan, furthermore, where babies __9__ are carried on their mother's back, infants do not acquire as much attachment to eyes like they do in other cultures. As a result, __10__ Japanese adults make little use of the face either to encode or decode　meaning.

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