When and where to build the new school _______( not decide) yet.

问题描述:

When and where to build the new school _______( not decide) yet.

has not been decided
因为同时用两个或更多的疑问词引导的主语从句看作是一个整体,谓语用单数.但如果是两个并列的主语从句作主语,谓语应该用复数.
如:What he has done and why he did it are not quite clear.