Tom is an English boy. He is from London. He likes China very much and speaks a little Chinese. He is a student in No. 17 Middle School. He is in Class 2. His sister, Kate is in No. 8 Middle School. She is in Class 4. Wang Lan and Wang Pin are his classmates(同学). They often help Tom with his Chinese and Tom helps them to learn（学习） English.

Today, Tom has two new classmates. They are Lucy and Lily. They come from the USA. They are twins（双胞胎）. They look the same. They are twelve. But Tom is not well and he is not at school. Wang Lan and Wang Pin look after（照顾） Lucy and Lily. They are all friends.