This is the small house less than 15 square meters, under roof lives a large family of three generations.
A. which
B. that
C. its
D. whose
网友回答
A. which
B. that
C. its
(答案→)D. whose
解析：考查定语从句。先行词是house，在定语从句under roof lives a large family of three generations中作roof的定语，所以选D。