根据句意用括号内所给单词的适当形式填空。
Don’t be           all day , it’s not good for your health. ( happy )
I have _________ free time among four of us. ( little )
I don’t think Jim’s English magazine is as _______ (interest) as that one.
---Do you know the ________ (high) of the teaching building? ---- About 15 meters.
Amy is one of the best            (swim) at the school.