Either the ways or the time _____ yet,but you may ask the headmaster for some information.
问题描述：
Either the ways or the time _____ yet,but you may ask the headmaster for some information.
A.isn't decided B.hasn't decided
C.aren't decided D.haven't decided
为什么不选B?yet 不是用于完成时吗?
答
其实这道题不用看yet.此空一看就应用被动语态,排除BD,另外,either…or…引导的句子,谓语动词用单数,即可知选A既然你问了yet,就说一下吧~yetadv.1.还,尚,仍然2.已经3.甚至,更4.现在；即刻；马上 5.从现在起直至某一时...