I’ve bee good friends with several of the students helped me in the English speech contest last year.
A. who
B. where
C. when
D. which
网友回答
(答案→)A. who
B. where
C. when
D. which
解析：考查定语从句。本定语从句的先行词是students, who指代先行词在句中做主语。句意：我和去年的演讲比赛中帮我的几个学生成了好朋友。故A正确。