Question

_______ he has made a decision, it is not easy for you to make him change his mind.

A．Though

B．Unless

C．Once

D．Until

Answer 1

C

试题分析：Though尽管；Unless除非；Once一旦；Until直到……时。句意：一旦他做了决定，想使他改变主意是很难的。根据句意故选C。
点评：本题难度适中。判断从句中用哪个连词，需用记住连词的用法，在句中的作用，连词也是高考的热点，需要考生平时多练习。需要考生会分析句子成分理解句意。
即学即练：I don't know him well _______ I've known him for a long time.
A. Though    B. Unless    C. Once       D. Until
解析：A。句意：我对他并不了解，虽然我认识他已经很长时间了。