Please have a look at sentence below:
Before one votes on the propositions, it's truly vital that he or she becomes familiar with the reasons for voting both for the proposition and against the proposition.
Before one votes on the proposition, it's truly vital that he or she becomes/become familiar with the reasons for voting both for the proposition and against the proposition.
Does it have any grammar issue?
My
My book says, "become familiar", "proposal".
Agree Do you agree with the book?