Прочитайте текст. Выберите один из предложенных вариантов ответа. Заполните пропуск (A30).
Even the earliest people, who (A22) ... the world about four thousand years before Christ, loved art. They produced many (A23) ... of art including paintings and sculptures. Pictures were typically (A24) ... on the walls of the caves which (A25) ... people with shelter. These caves could be described as people's first homes. It seems that people learnt to make dyes or paints from stone very early on in their history. White, for example, was produced from chalk and black from charcoal (уголь). The mineral was (A26) ... with water to make the dye. Some communities even heated minerals to produce new colours. Among the most (A27) ... cave paintings in Europe are those which were (A28) ... in the Lascaux caves in south-west France. They were first (A29) ... by schoolboys who were (A30) ... the caves. The paintings show pictures of animals such as bulls, cows, deer and horses. The pictures are very lifelike, showing that the artists had studied their subjects very (A31) ... .
Правильный ответ (were) exploring — исследовали.
playing (IN the caves) — играли в пещерах, не подходит, нет предлога.
Правильный ответ указан под номером 3.