Вопрос по английскому языку:

Помогите пожалуйста!!!
Заполните пропуски определённым или неопределённым артиклем.
1.These are ...brown desks. ..Desks are in ...room.
2.Those are ...engineers. ..engineers are at ...office.
3. ..office is large.
4.This is ...book.It is my book. ..book is on ...table.
5.She is ...student.She is ...good student.
6.Mike is ...man.He is ...nice man.
7.Where are ...telexes?They are on ...table.
8.Ann is his wife.She is ...economist.
9.Where is ...letter&It is in my book.
10What colour is ...cup? ..cup is white.
11.This is lesson nine. ..lesson is long.
12. ..flat is not large.
13.This is ...tea.This is ...good tea