A few people bought some books in my school's stationery store and did not get the answer booklet. So I'll upload it here. Also I am not sure how, so I will not blame the supplier or the school bookshop.
pure history students you are on your own (I just don't happen to know someone from pure his).
Ten year series from 2012 to 2021 if you are using chromebook, it is smarter to just download it.
have fun good luck lmao