专升本考试

根据网考网考试中心的统计分析，以下试题在2018/1/10日专升本考试习题练习中，答错率较高，为：73%
【单选题】In their letter to the students' representative assembly, the freshmen insisted on in the Student Union.


A．represented
B．being represented
C．having represented
D．have been represented