when and where to go for the on-slary holiday___yeta:are not decided b:have not been decided c:is not being decided d:has not been decided

问题描述:

when and where to go for the on-slary holiday___yet
a:are not decided b:have not been decided c:is not being decided d:has not been decided

选D哈。
yet:用完成时的标志
when and where to ...放在一起用单数形式的

选D啊。结尾处很明显有个yet

D.
两个疑问词作主语时,谓语动词用单数,而且是现在完成时.