基数词、序数词填空,Mr Black lives on the ( ) floor.(six)

基数词、序数词填空,Mr Black lives on the ( ) floor.(six)
还有两题,同样使用基数词和序数词填空
Autumu is the ( ) season of the year.(three)
The ( ) boy is very strong(twelve).
I always borrow some books ( ) the library.
A.to B.from C.in