Seven-character homophonic joke

On the first day of school, the teacher asked Xiao Ming, "Xiao Ming, 1+ 1=?" Xiao Ming said, "I don't know." The teacher said, "Then go home and ask your family." Xiao Ming went to ask his mother, who was quarrelling with others. Xiao Ming asked, "Mom 1+ 1=?" Mom said, "Asshole!" Xiao Ming knows 1+ 1= asshole; Xiaoming went to ask his father again. Dad is drinking beer. Xiao Ming asked, "Dad 1+ 1=?" Dad said, "Cool!" Xiao Ming knows 1+ 1= cool; Xiaoming went to ask grandpa again. Grandpa is watching TV. Xiao Ming asked, "Grandpa 1+ 1=?" Grandpa said, "gangster!" "Xiao Ming knows 1+ 1= gang boss; Xiaoming asked his sister who was singing the national anthem: people who don't want to be slaves! Xiao Ming knows 1+ 1= people who don't want to be slaves; Xiaoming went to ask his sister who was singing children's songs: rabbit, open the door! Xiao Ming knows 1+ 1= bunny opens the door. The next day, the teacher asked, "Xiaoming 1+ 1=?" Xiao Ming said, "Asshole." "Pa" teacher slapped Xiao Ming, and Xiao Ming said, "Cool." The teacher said inexplicably, "Who taught you?" Xiao Ming said, "The boss of these people. The teacher was startled and asked, "Xiao Ming, what are you doing?" "Xiao Ming sings: people who don't want to be slaves. The teacher shut Xiao Ming out of the door. Xiao Ming knocked at the door and sang, Bunny, please open the door.