Usually in a quadrangle there is an open yard at the center surrounded by single-story rooms.
A.single-story
B.two-story
C.three-story
D.four-story
正确答案：A
Usually in a quadrangle there is an open yard at the center surrounded by single-story rooms.
A.single-story
B.two-story
C.three-story
D.four-story
正确答案：A