It is a teacher's responsibility always to hope, with learning, a boy's character might be changed.
A. when
B. what
C. that
D. which
网友回答
A. when
B. what
(答案→)C. that
D. which
解析：答案：C。句意：老师的职责总是希望一个孩子通过学习可以改变性格。考查名词性从句的引导词。it为形式主语，真正的主语是不定式to hope...，that的引导从句作hope的宾语。