作业精灵老师示例：
You will find something interesting about China.
The weather in China always changes with seasons. It's warm in spring, hot in summer,
cool in autumn, cold in winter. Sport-lovers will like playing table tennis and badminton.
Because they are exciting. There are interesting cities like Beijing and Shanghai. Some
interesting places are worth a visit, for example, the Great Wall and the Summer Palace.
You must try Beijing Duck if you come to China. It's delicious.
People in China welcome visitors. Welcome to China !
