One School with Six Pairs of Twins Taking Exam Together

They are students in middle  school, They will take high school entrance examination tomorrow, They have a wonderful connection: a pair of them have the same height and same weight, a pair of them have mysterious mind induction,  and a pair them always make the same mistakes in doing homework.

 
Ringht, they are twins, and all of them come from Ziwo Experiment Middle School. Yesterday, reporters saw the six pairs of twins at school. Before examination, they were all encourage their brothers (and sisters), and wish all candidates in the city get good results in the exams.