Answer:
1) The revised version of the paragraph would be as follows:
Huckleberry Finn was an excellent book. It told of a raft journey down the Mississippi. The book has been enjoyed by children and adults. I like to read once a year. Maybe we all have that desire to be free. You can get away from it all when you read about Huck.
2) The passage with the correct punctuation of the section of the paragraph is the one that follows: I like to read it once a year. Maybe we all have that desire to be free.
Step-by-step explanation:
The first option is the right choice because in this sentence the writer is stating that he likes reading Huckleberry Finn once year. It's a fact. Therefore, it would not make sense for an adverb of probability like maybe to be included in the sentence. The adverb is part of the next sentence in which the writer presents a thought, a belief. He thinks that probably we all have a desire to be free. But he does not know it for sure.