you will be able to pass the examination-------.

问题描述:

you will be able to pass the examination-------.
A if you do some recision every day
B while you are doing your homework by yourself
C before you begin to study hard
D until you follow your teachers' advice
选哪个,请指教

A
句子的意思是你将能够通过考试如果你每天复习一点的话