Having trouble understanding John Keats' Ode to Nightingale and Ode on Melancholy

I have trouble understanding the two poems. In order for me to understand it , I would appreciate it if you could explain by each stanza.

Which one of the following sentences is grammatically correct?

Which one of the following sentences is grammatically correct? a) Although Washington was the founder of the country and Lincoln was the preserver. b) Our apple trees have grown amazingly well you ought to see them. c) Mr. Hanson is out of town, however, we expect him back next week. d) There is little we can do to help, for he is to stubborn.

Grammar

Which one of the following sentences is grammatically correct? A) The company closed it's offices. B) The company closed its offices. C) The company closed there offices. D) The company closed their offices. MY THINKING WOULD BE B AS THE CORRECT ANSWER, AM I CORRECT?

Pronoun

Which sentence correctly uses a pronoun? A) Is Ted better informed than I? B) She was as late as me. C) Give the book to the manager or I. D) My sister is as tall as her. My thinking would be D, Am I correct?

Grammar

Half the apples ____ on the floor, but some of them ____ on the table. A) are: are B) is: is C) is: are D) are: is My thinking would be A), would I be correct? Apologies if these questions sound so easy, but english is my 2nd language, which I am trying hard at improving.