Ключевые слова: ad, adv, advice, african, american, black, book, boy, child, choice, choose, clock, college, copyspace, earth, education, ethnicity, finger, geography, gesture, globe, happy, homework, joy, kid, knowledge, learn, lesson, literature, little, male, man, planet, pointing, promotion, pupil, read, recommendation, schedule, school, schoolboy, shopping, showing, sign, smiling, student, study, time, yellow, young,