6.
1)a/an
2)the
3)a/an
4)the
5)the
7.
2)a, the
3)a, the
4)an, the
5)an, the
6)a, the
8.
2)a present-the present
3)in the office-in an office
4)bike is old- the bike is old
5)a table- the table
6)a black one-the black one
7)the salt-a salt
1. a
2. a
3. b
4. c
5. c
6. c
7. a
8. b
9. d
10. a
He has already been to Paris.
She is writing a letter to her friend now.
My mother cooked this pie yesterday.
We have three flags.
She will give my book to me next Sunday.