The answer to number 8 is because "Pride" can be both a collective noun (as in a pride of lions), or an abstract noun (as in pride before a fall).
I had to have 'gerund' explained to me. Apparently it's a noun that can be used as a verb e.g. Teacher becomes Teaching.
Oops... cross post with all of the above.
Edited: 06/02/2013 at 14:38