English is a global language, spoken by hundreds of million of people all over the world, both as a first and as a second language and it is used in various fields, such as business, medicine, science, academic, journalism, literature, diplomacy, modern technology, etc. So, nowadays, it is necessary not only to speak good English, but also to have language certificates, in order to enter a University, to gain scholarships, to have a good job and a good position in the society. Also, it is very useful when travelling abroad and when using social networks and modern gadgets.