Choose the right alternative a/an or the. 1.We39;ve just bought a/the

Choose the right alternative a/an or the. 1.We39;ve just bought a/the new house with a/the large garden. 2.I wrote a/the long letter to Jenny this morning. 3.Did I show you a/the letter I got from Peter this morning? 4. I usually buy a/the newspaper on my way to work. 5.Last night I saw an/the interesting programme about Eastern Europe. 6.I really enjoyed a/the programme about Eastern Europe last night. 7. I learned to drive a/the car when I was 18. 8. Dad, can I borrow a/the car tonight? 9. A/the dog makes a/the good pet. 10. Could you pass a/the salt, please?