I don't know the meaning

ref: Macmillan's  school learning material, 'My Treasure Trove'(Literature in English, class 7)
      query: what is the meaning of the word - 'exasperation', is it 'mild annoyance or extreme annoyance'?
                 This word is used in the lesson - 'The Princess from China' by Mrs. Suryakumari Dennison
                                                                    on pg.16 

An enthusiatic teacher seeking a challenging opportunity.

My Treasure Trove (Literature in English), class 5
lesson: Seven days make a week
pg.45 activity 16. Fill each blank with the noun form of the verbs in bracket.
                             b) Hema tries to do a good ______ every day.(do)
                               What is the noun form of the verb 'do'?

An enthusiatic teacher seeking a challenging opportunity.

I hope i get my answers here.