【题目】A great number of students said they were forced to practice the piano.
A.to question
B.to be questioned
C.questioned
D.questioning

【答案】C
【解析】句意：很多被询问的学生都说他们是被迫去练钢琴的。Students与question构成被动关系，表示被询问的学生。B项不定式表示将来。而本句表示的是已经被询问。故C正确。