问题补充：
Before you decide to leave your job， the effect it will have on your family.
A. consider
B. considering
C. to consider
D. considered
答案：
(答案→)A. consider
B. considering
C. to consider
D. considered
解析：before 引导的是时间状语从句，填空句为主句，而此主句为一祈使句，故动词用原形。其中 it will have... 为修饰名词 the effect 的宾语从句。
