问题补充:
He lives in a room faces the south.
A. whose windows
B. the window of which
C. whose the window
D. of which the windows
答案:
A. whose windows
(答案→)B. the window of which
C. whose the window
D. of which the windows
解析:考查定语从句,先行词是a room,句意:他住在面朝南的房子里面。定语从句可以用whose windows或the window of which及 of which the windows,但因为定语从句的谓语是faces,所以window是单数。选B。