he has made up his mind no one can make him change it.A. AlthoughB. UnlessC. UntilD. Once

问题补充：

he has made up his mind, no one can make him change it.

A. Although

B. Unless

C. Until

D. Once

答案：

A. Although

B. Unless

C. Until

(答案→)D. Once

解析：考查连词。Once一旦，句意：一旦他下定决心，没有人能让他改变它。选D。