1. The (A)stark, boxy forms of European modernist (B)architectural dominated United States cityscapes in the (C)building boom following the Second World War.

▶▷<어형 오류>-architecture 'of'의 목적어. 명사형.

2. The various (A)peoples who (B)developed North America (C)have made it a world (D)leader economic.

▶▷<어순 오류>-D, economic leader 형용사+명사 

3. (A)Through his paintings, Edward Hopper depicted the isolation, (B)lonely, and lack of (C)variety of the daily life (D)of small-town America.

▶▷<병렬 오류>-B, loneliness 'isolation' 'lonely' 'lack'은 병렬관계를 이루고 있다. 따라서 명사형으로 통일시킨다.

4. The 1880's saw not only (A)the creation of the curtain wall and wind-braced iron (B)frame also the architectural (C)mastery of (D)these structural devices.

▶▷<접속사 오류>-B, frame but also 상관접속사 not only A but (also) B

5. Usually pitched in the key of C, _________ may be tuned to B flat by means of a slide.

(A) the bugle
(B) because of the bugle
(C) the bugle that
(D) but the bugle

▶▷<주어 찾기>-A 동사 'may be'의 주어 자리가 비어 있다. 복문이 아니므로 접속사는 필요 없으며, 문두에 나선 'Usually pitched'는 분사구문이다.