1、Don’t climb on chairs or tables.翻译:不可攀爬桌椅。2、Don't make a noise.翻译:不要大声喧哗。3、Please raise your hand to tell the teacher if you have something to do.翻译:有事请举手报告老师。4、Please listen to the teacher carefully.翻译:请认真听老师讲课。5、Keep the classroom clean.翻译:保持教室清洁。