Everyone should obey the following class rules:每個(gè)同學(xué)都必須遵守以下班規(guī)：1.No sleep in the class上課不準(zhǔn)睡覺；2.Don't listen to music during the class上課不聽音樂；3.No talking freely不準(zhǔn)自由講話；...多一點(diǎn)4. Listen attentively.5. Don't play you cell phone in the class.6. Respect your teachers.7. Ask for leave politely if you have to go out during the class.