Do you know Sweden(瑞典)？It l__ 1__  in the north of Europe．It is the fourth largest country in Europe with an a__ 2__   of 450, 000 square kilometers and the  population of about 8.5 million. Over one third of them live in the three largest cities, namely Stockholm, Goteborg and Malmo. More than half of Sweden is c__ 3__ with trees. It is one of the r__ 4__  countries in the world. About 100 years ago Sweden became industrialized(工业化). Today less than one third of the people are f　__ 5__ .