Answer:
fueres
Explanation:
Si a Roma fueres haz lo que que vieres.
"In Rome, do as the Romans do"
Answer: hubiera
You’re welcome :)
Answer: Cuestan.
Explanation: Cuanto means How much in english, so the question is asking how much those books are going to cost. Whenever you see a Cuanto in a question like that, assume it's talking about a number of something, or money. So Cuestan means cost, in the terms of "How much does this item cost?".