Памагитиии пожалустааа
Заранее спасибо)

A/An - The see p. GR1

9 Fill in: a, an or the.

1 This is a book. The book is blue.

2 This is a rubber. The rubber is yellow.

3 The book on the desk is John's.

4 This is an apple. The apple is red.

5 The pencil on the desk is mine.