Помогите пожалуйста.
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.