这是一个宾语从句问题,选A
首先从句必须用陈述语序,则C是错误的,应该是which office the meeting would be held in
关于B和D,可以这样处理,把他们都变为完整的句子,则B是：the meeting would be in whose office,D 是：whose office was the meeting,意思明显是不对的
只有A,语序正确,换为the meeting would be held in which office 也没有问题,当然这里的in which等于where了再问下。。B 改成in whose office the meeting would be 这对么？翻译过来：会议在谁的办公室里看出来么，由于缺少谓语就造成了表意不明，会议在办公室里怎么样呢？策划、召开或者取消？所以还是不合适的