Điền một từ thích hợp vào mỗi chỗ trống trong đoạn văn sau. There are four (1)………………………in a year in our country. They are spring, summer, fall (2)………………….. winter. In the spring, the (3)…………………………is usually warm. Sometimes it is cold, but not (4)………………………..cold. There are many flowers in this season. (5)………………………..spring, it is the summer. In the summer, the days are long and the (6)…………………….are short. We often go on (7)…………………. in the summer. (8)……………………….is a nice season. The weather is often cool. In the winter, (9)…………………….usually very cold. The days are short and the nights are long. We always wear warm (10)………………………in the winter.