Exercise 2:
1. C (kept) 2. A (keep up with) 3. D (in) 4. C (turn on) 5. A (interested in)
6. B (seeing) 7. D (through) 8. D (on) 9. B (go) 10. D (by)
Exercise 3:
1. A (as) 2. C (to) 3. A (of) 4. C (get access to)
5. A (reached) 6. D (with) 7. B (extinct) 8. D (handle)