21.  When I got to he river bank, I found that there was several children swimming in the river.Many of them were good at swimming.

22.  We were asked to volurtary labour in order to greet sanitation exam of the whole country by Mr Zhu today.

23.  The rain was so greatly that we were stopping cleaning.

24.  But we were discovered by Mr Zhu at last.

25.  We were very excited.

26.  The teacher said: "You were right.

27.  In a twinkling, My classmate's sight were centralizing at me.

28.  But the teacher sad " You were hearing it, but I didn't hear what he said."

29.  The Emperor heard the cries and knew that the people were right.

30.  In the Class, I was the best student, but since I studied in this school, my results were not as god as before.