The ~ was a period of time which began when people started making things from bronze about 4,000–6,000 years ago.
N-PROPER: the N
The ~ was a period of time which began when people started making things from bronze about 4,000–6,000 years ago.
N-PROPER: the N
Collins COBUILD. Толковый словарь английского языка для изучающих язык Коллинз COBUILD (международная база данных языков Бирмингемского университета) . 2012