Question

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

A．to question

B．to be questioned

C．questioned

D．Questioning

Answer 1

C

考查过去分词作定语。句意“许多被问到的学生都回答说是被迫练钢琴的。”students和question之间是动宾关系，故用被动；questioned相当于who were questioned。故选C。