There are different factors which make that language dominant and important; some people see it as their window to the outside world in the sense that they can use it as a medium of communication with others from different countries because it is widely spread. Others believe that through that language they can check recent researches and read books from other countries so it represents for them a source of knowledge. It is widely recognized that the English language is becoming an effective means to communicate, to participate in international business activities, and to obtain information about the events all around the world. In her book "Teaching English Overseas", Mckay (1992) demonstrates that the reason for the widespread of English is the belief that a certain proficiency in that language may provide social and economic gains.