New technologyto stop the students from cheating in the exam last year.A. is used B. used

问题补充：

New technologyto stop the students from cheating in the exam last year.

A. is used B. used C. was used

答案：

解析：be used to sth习惯于某事;used to do sth过去常常做某事. sth be used to do sth某物被用来做某事。句意：去年在考试用新技术被用来防止学生们在考试中作弊。结合语境可知选Ｃ。