Βιβλίο Total English - Άνω του μεσαίου - Ενότητα 3 - Μάθημα 1

used to express that something happens continuously from the beginning to the end of a period of time

scientific knowledge put into practice in a particular area, especially in industry

ready for being used or acquired

a long movie full of adventure that could be about a historical event

occurring or existing before what is being mentioned