Teacher Alex is coming.........All Rise,Attention,Bow,Seat
When teacher comes into classroom, the chief of class should yield loudly and clearly；
“All Rise!”（all students stand up）
“Attention!”（all students stay put）
"Bow!"(All students bow to the teacher, and say 'good morning,teacher')
“Seat!”（after teacher reply ‘ good morning students’, then, all students are allowed to sit down）
ps：Homework will be turned in soon.
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