从方框中选出合适的单词补全下列短文，每词限用一次。

spring    winter  autumn  summer  four

    Beijing is a nice place．There are seasons in a year．In ， It's warm and sunny．In ， it's hot. In ，it's always cool and windy. In ，it's cold． I like cool days and bright sunshine．So I like Beijing's autumn best．