几个英语选择= 求答~1.No conclusion _______ about whether to tear dow

几个英语选择= 求答~
1.No conclusion _______ about whether to tear down the old buildings for a theme park until several discussions have been made.
A.will be reached B.is reached C.is being reached D.had been reached
2.I haven’t __________ idea how that terrible accident could have happened to such a little boy.
A.little B.the least C.less D.the little .
3.Failure hurts grown –ups as well as children,__________ it can make a positive contribution to our life once we learn to use it.
A.but B.since C.until D.if
1.我选B.时态啊= =.
2.我选A.为什么额、、
3.我选C.为什么until不行.“直到我们会积极应对了,否则失败会对我们产生伤害”?.