This is a quote from "The Lord of the Rings", right? I think your definition is correct. It describes the Mine of Moria, a labyrinth of caves and tunnel. The layout is crazy; there is no way you could remember it. As for the sentence structure. I am not an expert in grammar, but this is my best guess: The main body is just "It was bewildering" TOPIC: "It" (noun) PREDICATE: "was(verb) bewildering(adj)" The rest of the sentence is part of the predicate, a prepositional phrase, which acts as an adverb to describe the adjective "bewildering". PREPOSITIONAL PHRASE: "beyond hope of remembering" The main body of the sentence states: it (the Mine of Moria) was bewildering. And the prepositional phrase adds additional information answering the question: "how bewildering was it?"

A classmate's birthday

Today, a girl in my class bought five cakes to celebrate her birthday and invited us to eat. I didn't know about it until the party began because she gave her invitation in class when i was not there. Actually, i had not gone to class all of the day. So, when they called me, i had just finished eating, and addly, i even had homework to do, so i said that i woundn't go. But, she, my friend, did not give up. She said there was too much cake to eat and that we must go to help them. I knew that she just wanted us to can join in them, so my roommates and i went to the party. When we arrived, it was already very noisy, there and we joined them naturally. I hadn't been to a party for a long time. and i always eat alone, so i hardly have the/a chance to chat with my classmates. Now I'm glad that I went to the party. We chatted so much in just half an hour. For example, we talked about a teacher who had a great blind date, a girl who had a boy to pursue her(,) and a girl who got sick and took a rest at home. Suddenly, i felt a little sad because i was busy these days and didn't know many of the things that happened to my friends near me.

I think since the question asks for the [day], the best answer uses a day of the week (Sunday, Monday, etc.) If you asked "What is today's [date]?", then the best answer will use the month and day number.

X-rock Climbing

It was a crazy experiences. One Saturday, I woke up and thought, "I need to do something, maybe a challenge for myself". Then I decided, I will go to artificial climbing. When I saw the Artificial Mountains, I was scared a little bit (you can also say: I was a little bit scared), because it was about 25-30 meters high. It was easy when I started, but crazy when I climbed to middle.  My hands and legs were constantly shaking; I've wanted to quit but the safety staff always shouted "Come on, you can do it". I was breathing steadily, looking forward and trying to tell myself "I can do it". And I did it. It was amazing!

*remember to keep your verbs in past-tense since you are talking about something in the past. very interesting story.

I'm also still learning Japanese, so I hope this is correct for you. 1) Instead of これの, you can use この, as in この質問(this question) これ is a noun on it's own, so これの質問 is kind of like "this's question". この is sort of like the adjective version of これ. 2) The position of も. Where this particle sits in the sentence will change the emphasis. If you say 私も, it feels more like "In addition to all these other people, I also have a question." If we move the particle after 質問, it feels more like "in addition to all these other questions, I also have this other question." 3)Past or non-past tense verb. Depending on the situation you may want to use the non-past tense あります instead. If you currently want someone to answer your question 質問があります。 If the opportunity already passed, and you had the question before 質問がありました。 4)One of my language partners used this phrase もう一つ（もうひとつ）"one more/another". This might be a good fit for your question. 先生：わかりますか。"Do you understand?" 学生：すみません、もう一つ質問があります　"Sorry, I still have one more question." **Someone please correct me if I got something wrong.