21.  Please explain them to me.

22.  When the boy met the girl, they liked old friends , then the people let them Marry.

23.  Mr Zhu gave several question for us, the one of them was if Zhou Pu Yuan loved Lu Si Ping , then some people said Zhou Pu Yuan loved Lu Siping, the others said Zhou u yuan didn't love Lu iping.

24.  Mr Zi Shui is p6,11-3] one of them.

25.  The teachers in our school are all excellent, they have good learning and rich experience, they are strick with us.We all show repect for them.

26.  Flowers are very beautiful, people like flowers, they often plant them in the balcany or courtyard.

27.  Plant flowers is a knowledge, we must water them every day and apply fertilizer properly .

28.  When they grow up, we must change another flowerpot, and trim them, if we don't do , they will be withered .

29.  If we do these, they will grow better, then we can trim them , we can according to their feature to make them beautifully shaped .

30.  When I got to the swimming-pool, there's several children in it, many of them are good at swim, one of them was studying swim, her mother as teacher her .