初四英语：When we arrived at the hall,the meeting--------------fo

初四英语：When we arrived at the hall,the meeting--------------for just aminute.
-When we arrived at the hall,the meeting--------------for just aminute.
-What a pity!
A.has ended
B.had ended
C.has been over
D.had been over

D用过去完成时,因为你到的时候是过去的事情（arrived）.会议已经结束了一分钟,end 是瞬间动词,要用延续的be over
再问： 谢谢高手！可我总是现在完成时和过去完成时不分，你能举个例子解释一下区别吗？
再答： 你就记住用过去完成时时，上下文中一定有个过去时间，你所用的过去完成时发生在它之前（过去的过去） 如By the time he was ten,he had read 10 books.(截止他十岁，他已经。。。） Before he introduced himself,i had met him twice.
再问： 那这个句子： I ----（call）a taxi for you.It will come to pick you up at 7 tomorrow morning 用什么呢？我认为是过去完成时啊！
再答： have called 我已经给你找个出租车了，一会就来接你，当然用现在完成时了，没有过去的过去啊