问题
选择题
When and where to go for the on-salary holiday _____ yet.
A．are not decided
B．have not been decided
C．is not being decided
D．has not been decided
答案
答案：D
考查时态。句意：什么时候去哪儿过这个带薪的假期还没有决定。可知描述的是现在已完成的动作，主语When and where为抽象事物，不可数，故助动词用单数形式，选D。