1、Have a seat

请坐

2、Help yourself

随意（招呼客人）

3、Come in

请进

4、Wake up

醒一醒

5、Get up

起来

6、Trust me

相信我

7、Keep the change

不用找（零钱）了

8、Leave me alone

让我静一静

9、Be careful

小心

10、Hang on

等一下

1.Don't arrivelat for class.You must be on time.

2.Don't run in the hallways.

3.Don't eat in the classroom.

You must eatin the dining hall.

4.Don't listen to music in class.

5.Don't fight.

6.Don't fight with someone.

7.Please do not trample flowers.

8.Save water.

9.Don't litter.

10.Save electricity.