A great number of students said they were forced to practise the piano.A. to questionB. t

问题补充：

A great number of students said they were forced to practise the piano.

A. to question

B. to be questioned

C. questioned

D. questioning

答案：

A. to question

B. to be questioned

(答案→)C. questioned

D. questioning

解析：考查分词做定语。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。句意：很多被询问的学生都说他们是被迫去练钢琴的。故C正确。