Написать на английском про любимый супермаркет Чудо Маркет ,используйте настоящее простое время

I would call a supermarket the most convenient inventions of the XX cen-tury. We should be thankful to Micheal Callan, an American who worked as an administrator in a grocery store and then in 1930 opened his own first supermarket with a wide range of goods.