The key answer of exercise 5

a)

1. C
2. N
3. N / A
4. A
5. P
6. O
7. C
8. O
9. N
10. P
11. P
12. P / C

b)

1. are guaranteed to; will undoubtedly
2. 's crucial
3. have to be capable of (selecting and prioritising); are expected to be capable of (selecting and prioritising)
4. Being capable of (articulating)
5. I would guess
6. (You) 're expected to
7. it will undoubtedly; it is guaranteed to
8. 're expected to; have to
9. 's crucial
10. is highly unlikely
11. most probably
12. I would guess