What you want to do is at the beginning say
NARRATOR
Have you already read this before?
choice
“Yes” {
goto endofchapter1 (or just any label you want)
}
“No” {
goto readchapter1
}
label read chapter 1
YOUR STORY
label readchapter1 (or any label you want)
the labels and gotos have to have the same name. Hope this helps!