When I arrived at the station, the train .
already left
was already left
has already left
had already left
would already leave

ответ: Had already left

Ithink it is impossible to live in our modern word without travelling because there are many interesting places to visit and see. railway and bus stations, airports and seaport are busier in summer than in other seasons of a year because of school holidays. travelling is the best way of spending holidays because you can visit different interesting places in your country and abroad. i prefer to travel by train because i like to look out of the  window and watch the nature and a lot of small towns and villages. of course, i usually travel with my parents because i am a teenager and my parents don’t allow me to travel by myself. i have already been in moscow, berlin, volgograd,  saratov. i have never been to london. it’s my dream. seaside is better to travel in summer because you can swim and dive, sunbathe and relax. my parents and i always take a camera with us when we are going to travel because we like to take photos very much. to my mind it is better to travel for pleasure because you may relax and don’t think about business.  

there are many reasons why  everyone   should learn a foreign language.

firstly, learning a language of another country helps one understand its culture.    language becomes a peephole to look at the nation’s culture, its traditions and its history. italian film director federico fellini says, "a different language is a different vision of life". 

research has shown that having studied a foreign language one can understand one’s own language better. it deepens the understanding of one’s own culture. general language skills improve after studying foreign languages.

another thing that talks of the importance of foreign language study is touring to foreign countries.

  eventually, knowing a foreign language  opens new job and employment opportunities in many countries and markets and it's grate!