ANSWERS

1. AC/DC

2. Four answers. Athens, Los Angeles, Paris and St Louis.

3. Deep Impact

4. Negev

5. Thombstone

6. Answer d. Boca Juniors

7. Two answers. Nokia and Motorola

8. Colour blindness

9. The Blue train

10. Three answers.
a. The Tide Is High (Blondie)
b. River Deep Mountain High (Tina Turner)
c. Rocky Mountain High (John Denver) 

11. Two answers. Argentina and Chile

12. Witness

13. Four answers.
a. the sound of ringing bells (or ringing bells)
b. shade
c. words
d. sand 

14. Tom Cruise

15. Harry Potter

16. Answer d. India (Statue of Unity)

17. North by Northwest

18. Deserts

19. Answer a. Saudi Arabia

20. The mausoleum