选择题：
Nothing can stop a ___ student ___ his mind to give up his studies.
A.promised; to change B.promised; changing
C.promising; changing D.promising; to change
请详细说明原因，尤其是第二空。
參考答案:C 勤查字典！
a promising student 一位有前途的学生
stop sb （from）doing sth阻止某人做某事
补充：
关于ing和ed形式 一般ing表性质，ed表状态 如 an interesting man(一个有趣的男人) ，be interested in sth（对某事感兴趣）；excit＋ed/ing 用法类似
stop词组：
stop doing sth 停止做某事
stop to do sth 停下（手头工作）去做某事
stop sb （from ）doing sth阻止某人做某事
