The English play my students acted at the New Year’s party was a great success.
A. for which
B. at which
C. in which
D. on which
网友回答
A. for which
B. at which
(答案→)C. in which
D. on which
解析：考查定语从句。本定语从句的先行词是the English play，定语从句的结构很完整，使用关系副词where,关系副词等于介词+which，本题只在这个戏剧中，用介词in。故C正确。