你好！
Since your English seems very good, I have written this up in a complete style (that is, not a style for a beginner)

Erik has done a nice job so I won't "re-invent the wheel" (Idiom: "unnecessarily repeat what has been done already")

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"pay" / "have been paying" Erik is right, however you could use "… have paid …" It's (it is) a simpler tense to use, but it's (it is) not as good as Erik's

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"… attention to animal testing". , not "… attention to the animal testing". It's (it is) better to omit that "the"

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its and it's
I always double-check this one myself.
Usually the apostrophe is used for a possessive before a final s (John's comment = 約翰的評論).
It is also used for contractions (I'm John = I am John = 我是約翰)

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But what about something like "its" ? It could go either way. "it's" could be 1) the contraction (= it is = 它是) OR 2) the possessive (belonging to it = 它的)
*** When it could be either one, it is the contraction. it's = it is ***
*** And, the possessive does NOT have an aprostrophe. its ***

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While I'm on possessives and final s, let me give you a link: http://data.grammarbook.com/blog/apostrophes/apostrophes-with-words-ending-in-s/

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There is a mistake that is getting more common in Canada and the US: It is to use an apostrophe for a plural. I saw a hand printed sign in a fruit market: "Apple's 75¢ each." It should be a simple plural: "Apples 75¢ each".

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I hope this is useful and I hope that I have used "的" correctly because I know that I am not clear on its use in 普通話. "的" usually seem to follow the possessor (約翰的書) but sometimes it seems to precede the possessor I think. However, I can't think of an example.

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祝您好運氣！

Physics

I like physics. With help of physics, people know what is thelightning, thunder, light, and rain are. Why rivers freeze in winter, why ripe fruit falls* from the trees. Even the flight of a bird is a description of the physical process. Physics is a life, is a nature. So** I have entered the Faculty of Physics at EKSU.

* This one can go either way.  It is correct to say "ripe fruit fall from trees" and it is correct to say "ripe fruit falls from trees".  In this second case, "fruit" is being used as a collective noun and this is the more common usage in my experience.

To pursue this further gets rather messy as "fruit" can be singular, plural or collective.  To further complicate things, "fruits" is also used as a plural.  And then one can get into whether one is using "fruit" as a countable plural or not.  As the point of your Note is Physics and as I am a retired high school Physics teacher, not an English teacher, I suggest we leave it at that.  I am almost 'in over my head', as we say!  8^)

Here are some links if you REALLY want to pursue it!

http://www.thefreedictionary.com/Collective+plural

http://data.grammarbook.com/blog/singular-vs-plural/plurals-of-odd-words/   { search for "fruit", about half way down }

http://www.thestar.com.my/story/?file=%2f2007%2f3%2f15%2flifefocus%2f17021531&sec=lifefocus

** "So" is correct but is rather casual.  "For that reason" or "Therefore" or even "Consequently" are also possibilites

I like your view of Physics and its perspective on the world around us!  Oтлично!

Festival*s*

There are many traditional festival*s* in China/. Such/*, such* as the Spring festival, the Lantern festival,* *the Dragon boat festival, the Mid-autumn festival, the Double-ninth festival, etc. Of course the Spring festival is the most important one, just like the western /new year/*New Years Day*, the Christmas holiday. I like the atmosphere of new year in the street. The stores *are* decorated with neon lights and flowers, everywhere {ring with the happy song} [I am not sure what you mean here] *… rings …*. All the people seem to be friendly and pleasant.
The Spring Festival is for family reunion*s*. Many people who are not living with their family in the same city [ Finish this thought.  Maybe { … city *can see their families*. }. In other words, /in/*during the* festival they have enough time to stay with their family. Usually we have 10 days for relaxing, so for some other people, they spend the festival holiday to travel.
Nowadays, many Chinese young people prefer western festival*s to* /than/ Chinese traditional festival*s*. I don't think that is good. Every festival has its history and culture. We should have /a/*an* open /mindedness/*mind* to accept the western culture and then we also should preserve our traditional festival*s*.

很多節！我不知道 龍舟節 或 雙九節。

Your English is VERY good.  Watch out for plurals:  One festival, two festaval*s* !  I know this is not how Chinese think - that is why you have to be so careful!!
For me, it is the opposite; I WANT to put an "s" on 節 that is, I WANT to write 節s I must say "No!" to myself. 
可悲的是我只知道一點點普通話。
再見

My new challenge

I have great jop job. its It's { = it is } my dream jop job.
and the only thing that can make me continue in this  jop job. ,
it's is my ability to speak English very well.

So my new challenge is, every day I want to talk (/speak) English with anyone who would love to talk with me.
And, I also want to taking take a lessons online from this side site.

https://drive.google.com/folderview?id=0B0DlscK73tVAUHBFSVlPTjhTMlk&usp=sharing&tid=0B0DlscK73tVATERVRzlLbFdEWmM

So, who's gonna do that this with me ?  (This last sentence is slang) or

So, who is going to do this with me?