问题补充：
He is one of the students, who, I’m sure, always do best.
A. his
B. my
C. one’s
D. their
答案：
A. his
B. my
C. one’s
(答案→)D. their
解析：who always do their best是一个非限定性定语从句，修饰students，I’m sure是插入语。
如果觉得《He is one of the students who I’m sure always do best.A. his B. myC. one’s D. their》对你有帮助，请点赞、收藏，并留下你的观点哦！
