On page 75, a huge crowd of citizens were seated in front of the stage where Chief Elder was. Then he went out to people and told them their jobs. But, the thing is that the Chief hasn't assigned Jonas his job.
On page 76, Jonas has been selected to be the next receiver of memory. This is because they have had their old receiver for a decent amount of time, it was time for someone else to have to job.
On page 76, The Chief Elder goes on to explain the qualities that a Receiver of Memory must possess. These qualities include intelligence, integrity, courage, wisdom, and the Capacity to See Beyond. Jonas is unsure whether or not he has this last quality, but as he looks out at the audience, he sees the audience change, the same way that the apple changed.
On page 77 Memory, the most honored position in the community. She explains that as a new Receiver trains, he is to be alone, apart, so the person selected must be perfect for the position because he can't be observed except by the current Receiver of Memory, who will train Jonas.
On page 77, During the selection process, if anyone on the Committee of Elders would have had dreams of uncertainty, the candidate would no longer have been considered for the position of Receiver. When considering Jonas, there were no such dreams of uncertainty.
On page 78, Remember that earlier in the book, when Jonas first saw Gabe's pale eyes, which are exactly like his own, Jonas thought that such light eyes had a certain look as if one were looking into the clear water of the river, down to the bottom, where things might lurk which hadn't been discovered yet. Maybe Jonas does have the Capacity to See Beyond.