关于主谓一致的一个问题
Where to get the materials and how to get them _____ at the meeting.
A.have not discussed B.have not been discussed
C.has not discussed D.has not been discussed
答案是B还是D
而且有一条语法解释有“由how and why,when and where引导的从句做主语时，谓动仍用单数。”就有些迷惑了。