阅读短文，从方框中选择单词，根据实际情况用适当的形式，使短文意思完整、通顺。每空一词，每词只能用一次。
| swim, four, snow, after, weather |
We know that there are
____ seasons（季节）in a year: spring, summer, autumn and winter. In spring, the
____ is warm. Everything grows fast. It is a good season for hiking (远足). Summer comes
____ spring. It is usually hot in summer. The children like to go
____. They are very happy in the cool water. It often rains and sometimes it rains heavily. In autumn, it is cool. The farmers are busy. It is often cold in winter. Sometimes it
____, and all the houses, trees and other things become white. The world is so beautiful in this season and people are very happy!
