根据上下文，从方框中选择适当的单词填空，并注意其正确形式。

    There are four seasons in a year. They are spring, , autumn and winter. In spring, it often rains. It is . Summer is very hot. I often wear a T-shirt and a skirt. is cold. I seldom go outside. My season is autumn. The turn yellow and from the trees. It is windy. I can fly a in the park. I usually have a picnic with my good friends in autumn.