Заполните пропуски артиклями. 1.this is very difficult text has no clear meaning. 2.there is book on the table the book has a bright cover. 3.he has collection of post stamps collection is very rich. 4.it is difficult problem ; problem is not solved yet. 5. she has son and a daughter children don't go to school. 6. there is letter for you in letter-box letter has been bought by post-man.