问题
选择题
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
答案
答案：D
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。