请负责人的网友帮忙看一下这道题应该选什么,Itismost____thatheshouldattendtheconference.[A]good[B]wanted[C]doubtful[D]desirable

　　请负责人的网友帮忙看一下这道题应该选什么,

　　Itismost____thatheshouldattendtheconference.

　　[A]good

　　[B]wanted

　　[C]doubtful

　　[D]desirable