To add to that, "pwned" is used as a humorous intentional typo (mistake), as if the person intended to type "owned" and hit the "p" instead of "o".

Here is an attempt: The famous movie Gone With the Wind will be on from this Saturday to next Friday. There are two show times, at 3:20 pm and 9:30 pm. If you feel like seeing this film, please register at the Trade Union Chairman's Office to register before 5 pm tomorrow afternoon. Tickets are 10 yuan each, only two may be booked per person. You can buy tickets for any showing. If you feel tired of other movies which are all approximately the same and want to see something different, come and check it out. You will not want to miss this chance to experience a feast for the eyes. Note I am not quite sure about the reason for the "chairman's" bit, so I assumed it was the Chairman's office. Please check that I haven't changed the meaning at all (e.g. the show times), some parts weren't quite clear without more context.

I am 20, silently.

My best friend asked me how I spent my birthday today, I know she really expected that I had a wonderful party or something, even though she couldn't celebrate it with me now (we are so far away from each other). I could have just told her "it was ok, not bad", but I still decided to tell her "Actually, I didn't celebrate this birthday."
After that, I was thinking, why couldn't l just be 20 silently, no celebration, no party... 
Think about it, when I was a little girl, I was looking foward to my 20th, now I am 20.

What do you think about the meaning of a birthday?

First notebook entry: Introducing myself

I am from Dongying in Shandong province which is the hometown of the remarkable militarist Sunwu and also the place where the China‘s second largest oil field is situated, known as "Shengli oil field".
As a norherner, i grasp fluent also standard mandarin and i am obsessed with English, so I sincerely hope to make an acquaintance with a native speaker for mutual benefit O(∩_∩)O.

Great job, just a few of those tricky little words :)

I don't think this is really a term on its own, it sounds like part of a sentence. Do you have the whole sentence? Sometimes context is needed. Pledged means promised, so it sounds like it could be part of a phrase such as "China pledged investment in Electronics last year", where someone or something promised to invest money in the past.

First notebook entry: Introducing myself

I'm so sorry, I can't speak French at all at present！
I can just speak a little English, really hope you can give me a hand !
Thank you very much！

No corrections needed really- awesome :)