If you’re talking about chapter 12:
Soda runs out of the house because he doesn’t want to hear Darry and Ponyboy fighting again. On top of that, his letter that he sent to Sandy was returned unopened.
I think that the phrase "sporting proposition" means a game of chance.
It was used in this dialogue:
<span>"Simply this: hunting had ceased to be what you call `a sporting proposition.' It had become too easy. I always got my quarry. Always. There is no greater bore than perfection." (1.96)
</span>
When you say "sport" is infers a chance of winning and losing. There is no sure outcome.
In the above lines, hunting has become a sure deal and it does not invigorate nor inspire the hunters to do better.
A student should keep her password a secret. Because we do not know a student is boy or girl.