书籍 Top Notch 基础A - 第 2 单元 - 第 1 课

the connection among two or more things or people or the way in which they are connected

someone who is or was in the same class as you at school or college

someone we know well and trust, but normally they are not part of our family

someone who is living next to us or somewhere very close to us

a person who is in charge of a large organization or has an important position there

someone with whom one works

someone who observes or directs a person or an activity

a person who is a member of the same team as another person, typically in sports or other competitive activities

someone who is paid by another to work for them