The Ice Age was a period of time lasting many thousands of years, during which a lot of the earth’s surface was covered with ice.
N-PROPER : the N
The Ice Age was a period of time lasting many thousands of years, during which a lot of the earth’s surface was covered with ice.
N-PROPER : the N
Collins COBUILD Advanced Learner's English Dictionary. Английский словарь Коллинз COBUILD для изучающих язык на продвинутом уровне. 2006