Does it matter ____ he can't finish the job on time?

问题描述:

Does it matter ____ he can't finish the job on time?
这里毫无疑问应填if,作为主语从句.但想知道是否能填that?

也可以用That.就是意思有点不太一样.If的时候,他不能按时完成工作的可能想要比that小.