Преобразуйте предложения, поставив существительные во множественное число.

1)I read this book last year.
2) He works for a big firm of designers.
3) She has been writing the article for one hour.
4) There is an office near our house.

*offices

book-booksfirm-firmsarticle-articlesoffice-offices

I read these books last years.The works for A big firms of designers.The has been writing the articles for some hours.There are an office near our houses.