hurry up ,or the tickets will have been sold out by the time

问题描述：

hurry up ,or the tickets will have been sold out by the time we get there
,hurry up ,or the tickets ____________out by the time we get there.
A.will have sold B .will sell C.have sold D.will have been sold
D项 ,为什么啊,D项是什么时态啊?

1个回答分类：英语 2014-12-01