Вставить артикль she is -- good teacher. Is this--book which you need? I want to buy--new briefcase. -- good book is always a pleasure for me. It is -- good idea. -- picture painted by the student is beautiful.

she is a good teacher

she is a good teacher.Is this a book which you need?I want to buy a new briefcase.This good book is always a pleasure for me.It is a good idea.Thi picture painted by the student is beautiful.