作业精灵老师示例：
S: My favourite festival is Spring Festival. It is in January or February. At this festival,
we get together with families. I usually have a big dinner and eat jiaozi.
My favourite festival is Mid-Autumn Festival. It is in September or October. At this
festival, we look at the moon. I usually eat moon cakes.
My favourite festival is Dragon Boat Festival. It is in May or June. At this festival,
we have dragon boat races. I usually eat rice dumplings.
My favourite festival is Double Ninth Festival. It is in October or November. At this
festival, we visit parents and grandparents. We can also climb mountains. I usually
eat rice cakes.
