What does Nick say that he has only done twice in his life?

Gotten drunk

Explanation:

The Great Gatsby is a novel written by Scott Fitzgerald in 1925 and the main plot follows Jay Gatsby obsession with Daisy Buchanan.

This novel is considered an American classic and it also portraits the excesses that took place during the 20's.

One of the main characters of this novel is Nick Carraway, a former Yale student, who went to World War I and he is Gatsby's neighbor (he is also the narrator of the novel). As the novel keeps going we can see that his manners fade and he starts living a life of excesses. However, in the second chapter of the novel, he goes to a party and he gets drunk, he then says that this is the second time he has gotten drunk in his life.

Therefore, the correct answer is Gotten drunk.