The historical circumstances in which the war developed were responsible for those unresolved problems in the Spanish society.

There does exist a dot-like icon beside a use's photo to show his or her online/offline status. If the dot is green, the user is online. But whether that particular user wants to have a talk right away is another thing. He is on but maybe he doesn't want to talk. You can contact the website makers through e-mail and suggest they install a new function that allows people eager to have a chat find each other more easily.

Hello, teacher. Please allow me to do a little bit correction to your writing. ( I find myself actually wondering what you teach at school)

China Agricultural University (you say Bank of China, so you should say Agricultural University of China.) & China's Youth Day

In (I'd suggest using "on" because you are talking about a time period of a particular day.) the evening of China’s Youth Day. I went to the sports ground of CAU, where a big party was being held. Singers sang and dancers danced (you need to use the past continuous tense here because you are describing what was happening at that time; Singers were singing and dancers were dancing). Many students went (were) jogging along the athletic track. I enjoyed the performances very much.
Occasionally, (You are doing a mental translation from chinese to english in the course of writing.)  I spotted several students were playing (better use "doing") rock climbing. The edge of the cliff, where the angle is over 90 degree (degrees) in many place(s), is very steep. They tried their best to climb as high as possible. It’s a kind of sports which full of stimulation and challenge. It’s an impossible mission for me to climb even only 3 meters, not to mention climbing to the top of the cliff.
Although China’s Youth Day is not suitable for me whose age is around 40. I’m very industrious, hard-working and enterprising. (the underlined part is very Chinglish, honestly. The syntax is very unnatural and thus needs improving.)! For me, I have every reason  looking (to look) forward for a more bright (brighter) future.

 

 

These two sentences are ok, but as friendly advice to hotel customers, you should make them sound more formal. Here I offer my version for your reference.

1. Please close the door all the time for the security.

Please always remember to lock your door for better security.

If you forgot  (no need to use the past tense) the passcode of the door lock, please come to the front desk on the 4th floor.

If you happen to forget the pass code to your room, please ask the receptionist on the 4 th floor for help.

2. If you want to open the door, push the small button with a heart sticker on it.

The door can be opened by pressing the small button with a heart sticker on it.

Hope this helps :)

By the way, you can also say ハッピー. If you don't know how to say something in Japanese and are just too lazy or tired to consult a dictionary, you just make the English word sound Japanese. There is a large chance that people are gonna understand you. It's an expedient tactic I want to share with you. Hehe :)

Try out: (1) www.arabicpod101.com 7-day free trial (2) www.arabicpod.net. 7-day free trial The first one provides detailed PDFs including explanations on grammar and culture to each lesson. The second one is a very prolific website, but it would be difficult for you to start with if you don't have any knowledge about the language. Hope this helps. :)

Szia. Jó reggelt!

Oh, you know I love learning Hungarian!:)

By the way, the picture is really, really száp.

A little of history about Budapest...

I`ve read an article about Budapest and decided to translate the (you should use the indefinite article "a" here instead of the definite one) part of it into English. 

There are (You cannot have two conjugated verbs in one simple sentence.) trolleybusses appeared in 1949 in Budapest. (Logicwise, it would be better to say "in Budapest in 1949", because the time is the information you are supposed to emphasize here and whatever needs to be emphasized comes at the end of a sentence.) The first one got number 70 at once, because this ("that" would be a better option. It was a long time ago.) year was (the) celebration of (the) 70th anniversary of Stalin. And now there are no trolleybuses (you use "busses" in the beginning sentence, but here you are using the alternative plural form of the word "bus". You should always use one fixed plural form for a word all through the same article to maintain consistency) before number 70 in Budapest.

I hope you will like this fact of history.

Those Days

Music is the ("a" would be a better option because personally i think there are more than one universal languages on this planet.)universal language and has such (you should add "a" here, though "influence" is an uncountable noun, but when preceded by an adjective, the word should take the indefinite article. Other examples are "a big vocabulary", "a huge knowledge" etc.) powerful influence on us.
A couple of weeks ago I was listened (should be "was listening")to the 80´s music...wow! my mind was raptured back (should be "pulled back")to those days when life was filled with enthusiasm for the future: romance, school, friends, carreer (spelling mistake, should be "career")and a bright road ahead.
I believe many people not matter the age (should be ", no matter how old they are, ")might think or feel in the same way that (you shoul always use "as" after "such", they always appear together)I do. Are (Do)you agree with me?