As an exchange student, Tony has studied in China for one year.He finds where students have lessons is different 1 China and America.
In China, most students stay in the same classroom to have different lessons.When the school bell rings, students wait for their teachers 2 then start their lessons.Students put their school things in the 3 .
In America, however, things are quite different.For 4 subjects, students are supposed to go and find the right classrooms.They have to 5 their classrooms.They put their things in the lockers （储物柜）out of the classrooms.
Tony thinks these two patterns have their own advantages.He likes both of them.
