英语单项选择题,在四个答案中选择正确答案,请详细说明理由.

英语单项选择题,在四个答案中选择正确答案,请详细说明理由.
-There-----an interesting report in the hall this afternoon.
-Really?Who---it?
1 is going to be ,give
2 is going to have,ia going to give
3 is going to have,gives
4 is going to be,is going to give
非常抱歉，呵呵，我打错了字母，1的备选答案不是 is going to be ,give，而是 is going to be ,gives