Translation of "20th" in Korean

We've seen it with 20th-century fascisms:

우리는 이러한 것을 20세기 파시스트들에게서 보았습니다:

By the middle of the 20th century,

전반적으로 읽고 쓰기가 가능하게 되었고

As a result of this work in early 20th century,

20세기 초 이 운동의 결과로

The NAACP spent the first two decades of the 20th century

20세기의 처음 20년을

Was practiced in the West as late as the 20th century.

20세기 서양에서 자행되었던 겁니다.

20th, when the Soviet Union dissolved in 1991 its western territory broke into

소련이 1991년 와해될때, 소련의 서쪽 영토에서

Throughout 20th-century pop culture, similar-looking mansions appeared again and again as signifiers

20세기 대중문화 전반에 걸쳐 비슷한 모양의 저택들이

You think that the country could be to the 21st Century what the USA was to the 20th?

호주가 과연 20세기의 미국 같은 나라가 될 수 있을까요?