用方框中所给单词填空的适当形式。

win ,  lazy ,  tidy up ,  myself ,  stamp

小题1:One of the ______ is my friend.
小题2:Tony is the _____boy in our class.
小题3:The students are busy ______their classroom .
小题4:The maths problem is easy, I can do it ______.
小题5:I’d like to collect ______ because it’s interesting.