Задайте вопросы к предложению, сделайте его отрицательным. Поставьте глагол-сказанное в прошедшее время: The Baikal Lake it contains about twenty percent of the world's fresh water supply.

1. The Baikal Lake contained about twenty percent of the world's fresh water supply. (Past Simple) 2. The Baikal Lake contains about twenty percent of the world's fresh water supply, doesn't it? 3. Does the Baikal Lake contain about twenty percent of the world's fresh water supply? 4. What lake contains about twenty percent of the world's fresh water supply? 5. I wander whether the Baikal Lake contains about twenty percent of the world's fresh water supply. 6. The Baikal Lake does not contain about twenty percent of the world's fresh water supply.