4. the present, present participle, past, and past participle forms of verbs
5. Juanita is marching in the parade.
6. past participle
7. The children winced in happiness over the new puppy.
8. They want to do a thorough job.
9. throbbing
The word you're looking for is prowess, however you didn't post a list. Prowess means superior skill, strength, or ability. Other similar words are expertise, aptitude, and mastery.
C. I think I don't know though
