if he -------- hard in thehe past five years,things wouldn't be going be going so smoothly.a.had not been working b.was not working c.has not been working d.were not working为什么选a 不选d

if he -------- hard in thehe past five years,things wouldn't be going be going so smoothly.a.had not been working b.was not working c.has not been working d.were not working为什么选a 不选d
if he -------- hard in thehe past five years,things wouldn't be going be going so smoothly.
a.had not been working b.was not working c.has not been working d.were not working
为什么选a 不选d

if he -------- hard in thehe past five years,things wouldn't be going be going so smoothly.a.had not been working b.was not working c.has not been working d.were not working为什么选a 不选d
这句主要考查的是虚拟语气的用法.
前句是与过去事实相反的虚拟语气,后句是与现在事实相反的虚拟语气.
所以正确答案是A.
因为与过去事实相反时,从句的动词要用had+done的形式.

因为 有 in the past five years这个标志性的词组
所以只能用完成时
又因为后半句是过去式
所以应该用过去完成时
所以选A