Use the articles where necessary to complete the sentences.
1.I think that ... Russia is ... best country in ... world.
2.There is ... big shopping centre in ... north of ... city. ... shopping centre has become very popular with ... customers.
3.Where are ... letters you are talking about? That`s ... only question I`ve got.
4. ... thermometer is used for measuring temperature.
5. ... book in ... yellow and brown cover is our English textbook.