Today, I really have something to write down and share with you here.

Today is the Mid-autumn Festival. Accurately speaking, it is [was] yesterday. I just want to express and write down something about what I feel, and I  [feel.  I] need to catch the inspiration now, so I can't help you to correct your articles now, though the content is very interesting.
You know, I have been busy since the starting [start] of this new semester and all kinds of homework are [is] waiting for me. So, even though I have [a] three-day holiday, I can just glance at your articles on italki. Maybe I have no time to chat with you, [or] even correct articles until next winter vacation. However[,] once I have time, I will give you the best one I think. [unclear] Mention of [Speaking of] the correction, I think the best one is the fittest one. [unclear] People should distinguish between the [what is] wrong and something is [that is] not native enough. I think this way is better for language learners, isn't it?
I'm also curious about the difference about [in] form between Chinese articles and English articles. In Chinese, you should leave [a] space of two characters' blank at the beginning of each paragraph, there is [paragraph.  There is] no line between the title and the body text. There is no line between paragraphs either. How about English articles? I'm not sure.
Did you ever hear about "十五的月亮十六圆"？Though [the] Mid-autumn Festival falls on the fifteenth day of the eighth month in the lunar calendar, in fact, most of the time, the sixteenth is the time when the moon is at its brightest and fullest round. However, this year the fifteenth is the time when the moon is said to be its "best".
I appreciated the moon, and shared the moon cake and some grapes with one of my roommates, because [the] others have gone bake to [gone to bake in] their homes. I didn't go back to home in [on] this short holiday, so my mother visited my grandparents, and my father is on a business trip in another city. However, we appreciated one moon! Just like the verse of a famous poem "千里共婵娟".