"title": HTML5 Crossword

Across

4. on the condition that (8,0)
6. difficult and tiring (7,0)
7. not probable or expected (8,0)
9. at risk of extinction (10,0)
12. resolute and persistent (10,0)
16. exceptional or remarkable (11,0)
17. demanding and thorough (8,0)
19. full of excitement and energy (12,0)
20. environments where animals or plants live (8,0)

Down

1. someone who sees the best in things (8,0)
2. becoming very wet (7,0)
3. demanding and challenging (9,0)
5. a disadvantage or inconvenience (8,0)
8. motivating and uplifting (9,0)
10. extraordinary or outstanding (11,0)
11. if not (6,0)
13. an impact or mark left behind (9,0)
14. involving multiple countries (13,0)
15. certain to happen (10,0)
18. center of attention or concentration (5,0)