根据句意及汉语提示，写出各单词的正确形式，每空填一词。
If someone is _____________ (没礼貌), we mean that they are rather rude and do not have good manners.
He lives on the___________ (十二) floor. I live three floors above him.
How much will each receive if the three apples are divided _______ (在……中) the three boys?
Now it is very easy for people to go ______________ (无论哪里) they like because of the high-speed train.
In ancient ________ (时代), man tried many different ways to write numbers.