4-5 / 24번 문제

On March 1, 1867, the state of Nebraska was admitted to the Union ___________ .

(A) when President Andrew Johnson vetoed was overridden 

(B) when President Andrew Johnson's veto being overridden 

(C) with overridden President Andrew Johnson's veto was 

(D) with President Andrew Johnson's veto was overridden 

답이 A인 건 알겠는데 문장 분석이 잘 안됩니다.

President Andrew Johnson vetoed 어딘가에 뭔가가 생략된 건가요?

만약 vetoed 앞에 who was가 생략된 거라면 "거부당한 대통령"이 되는데..

어떻게 해석해야 "대통령이 거부권을 행사한 법안"이 되는지 궁금합니다.

4-6 / 17번 문제

Zoos in New Orleans, San Diego, Detroit, and the Bronx have become biological parks ________ .

(A) where animals roams freely and people watch from across a moat.

(B) animals roams freely  where and people watch from across a moat.

animals는 복수인데 왜 roam 뒤에 s가 붙나요?

이 문장에서 animals가 단수 취급을 받는 이유가 있나요?

4-6 / 27번 문제

Composer Richard Rodgers and lyricist Oscar Hammerstein II brought to the musical Oklahoma! extensive musical and theatrical backgrounds as well as ___________ .

(B) familiarity with the traditional forms of operetta and musical comedy

(D) the familiarity of the traditional forms of operetta

[명사 + as well as + 명사]니까 빈칸에 명사를 넣으면 정답 아닌가요?

(B)와 (D) 둘 다 familiarity라는 명사인데 왜 (D)는 올 수 없나요