问题补充:
When and where to build the new schoolyet.
A. have not been decided
B. are not decided
C. has not been decided
D. has not decided
答案:
A. have not been decided
B. are not decided
(答案→)C. has not been decided
D. has not decided
解析:when and where to build the new school指的是“一件事”,故谓语动词用单数形式,且decide一词用作及物动词,所以应用被动语态。