Прочитайте текст. Для каждого предложения А-Е выберите один правильный вариант ответа. The Great Wall of China The Great Wall of China is one of the most famous buildings in the world. It is about 21,000 kilometres long and was built more than two thousand years ago. At first, the wall was made to protect the country from enemies. Later it also became a way to control trade along the Silk Road. People could travel safely because soldiers stood on the wall and watched for danger. The Great Wall goes across mountains, deserts, and rivers. In some places it is built of stone, in others of earth and wood. It is so wide in some parts that five horses can walk side by side on it. Today the Wall is one of the most popular tourist attractions in China. Millions of people visit it every year. Scientists say it is the longest structure ever built by humans, and astronauts have even taken photos of it from space. Questions: A. The Great Wall of China is about ... 1. 2,100 km long. 2. 21,000 km long. 3. 210,000 km long.