Question

when and where to set up the city football club__ a have discussed b is under discussion

我要的解释哟~~~

希望高高手告诉我详细的解释~~~

Answer 1

两个疑问词后接一个不定式，看作一个主语，所以谓语动词用单数。

又如：When and where to build the factory is still unknown.

希望能帮到你~

Answer 2

选 b

追问

我要的是解释~~~

希望你能再辛苦一下告诉我解释~~

追答

主语是单数