1. 3000 / 3,000, three thousand words
2. surprise / surprising ending
3. 16 / sixteen
4. August
5. Comp4ss
6. post
7. famous authors
8. online
9. public
10. Spain
11. world of water
12. (the) splash ride
13. (at) noon / middday / 12 o'clock / 12pm / 12 pm
14. feed (the) sharks
15. (a) birthday party
16. (the) government
17. (the/a) quiz
18. E
19. C
20. B
21. D B IN EITHER ORDER (21&22)
22. D B
23 mathematics / math / math(s)
24. theory / theoretical
25. jet engines
26. seminars
27. A
28. B
29. C
30. C
31. supportive
32. pay attention
33. next steps
34. consistent
35. graphics
36. tone
37. (a) silence / silences
38. weak verbs
39. repeat it
40. predicting