In the hallway of Lincoln High School, four students—Emily, Alex, Liam, and Sophia are talking and laughing happily.
Almost every friend group has a parent. Emily is certainly more responsible (有责任心的) than other three students. When they hang out with Emily, they don't need to worry about anything. She always has plans and makes sure things go well.
Alex, however, is a quiet but talented boy. He does well in exams. When his friends have some difficult problems in study, Alex often helps them out. Students are all surprised at his intellect (才智)and great problem-solving skills.
Liam is a born leader. He is cheerful and outgoing. He joins all kinds of clubs at school. At the same time, Liam takes part in outdoor activities. He often organizes school trips, running races and other interesting games. This makes Liam a popular star at school.
Sophia does different volunteer work after school. On Monday and Friday, Sophia goes to the children's hospital. On Wednesday, she brings foods to dogs and cats in an animal shelter (收容所).At the weekend, she helps clean up the neighborhood and look after the old people.
