Ключевые слова: active, activity, adult, alone, architecture, asia, asian, autumn, back, bicycle, blue, broom, building, bush, business, city, clean, cleaner, cleaning, color, day, downtown, dust, equipment, fall, garbage, green, job, leaves, male, man, modern, morning, occupation, office, one, people, person, poor, road, singapore, site, street, structure, trash, tree, uniform, urban, work, worker,