问题补充：
When and where to go for the on-salary holidayyet.
A. are not decided
B. have not been decided
C. is not decided
D. has not been decided
答案：
A. are not decided
B. have not been decided
C. is not decided
(答案→)D. has not been decided
解析：考查主谓一致和时态。本题中的yet通常与现在完成时连用，句子的主语是When and where to go for the on-salary holiday虽然使用and连接；但是这是表示同一概念，故使用单数形式。句意：何时何地去度过这个带薪假期还没有被决定。根据句意使用现在完成时的被动语态。故D正确。
