A large number of students give messages to their close friends through this radio club, hosts are all their schoolmates.
A. that
B. of which
C. which
D. whose
网友回答
A. that
B. of which
C. which
(答案→)D. whose
解析：whose引导非限制性定语从句，先行词为 this radio club，意为this radio club’s hosts。