Вставьте артикли, где необходимо. Очень нужно

Mr Lavrov has got ... friend. His name is Mr Petrov. He is ... businessman of Rossexport. They are ... large company. They’ve got ... customers in different cities. At 9 o’clock Mr Petrov comes to ... office. He stays in ... office all day. In ... morning he reads ... e-mail messages, and after lunch he writes ... letters to different companies. Mr Petrov usually finishes work at 6 in ...evening, but sometimes he stays in ... office until 7 o’clock. At home he plays with ... children or reads ... books.