he ( )here next month .答案won't work .isn't going to work .is

选 won't work next month 是将来时态的标志

正因为是一句客观表述，所以应该选 isn't going to work
用 will 同样可以客观表达未来，但要以将来进行时的语态，won't be working
换言之，从语境上来说：

He isn't going to work here next month = he won't be working here next month.

isn't going to work
不好意思刚刚看到你的求助，选isn't going to work。
其实这三个都有一般将来时的用法，但是be going to 表示一种经过考虑，有计划的东西，而其他两项则只是单纯的表示将来。
若理解请采纳。谢谢