Romeo and Juliet want to marry right away because they think that it would bring their families closer together and back in those days you married someone at a very young age and early.
In question like this you need to provide context like in Fahrenheit 451 on page(ex) then ask. But Montag was mostly afraid that the captain would begin to notice that he was starting to question their ways and if burning the books is really the right thing to do.
