根据句意，用所给词的正确形式填空。

根据句意，用所给词的正确形式填空。
1、Winter is ____（cold） season of the year.
2.Jim works____（hard）,but his brother works ____（hard） than he.
3.This radio is not so ____（cheap） as that one.
4.Please listen to me ____（careful）.
5.It's much ____（hot） today than yesterday.