The answer is h<span>uck is obviously not able to sit still and conform to the spelling lesson.</span>
The type of sentence given is a compound sentence. It is a compound sentence because it consists of two independent sentences: "I already said yes to someone else" and "I can't go to the dance with you". In order to link the two sentences, the conjunction "because" is used.
I would say that the lines which show us how desperate the poet is are the following:
"... helpless in my throes, Biting my truant pen, beating myself for spite--"
As you can see here, the poet says he is helpless, meaning that he cannot find inspiration to write what he wants to write. Therefore he is desperate for some inspiration, which is why he is biting his truant pen in order to show how anxious he is to get his inspiration back.
What are you trying to ask? Or am I just to stupid to see what you are trying to ask.....