31.  Other question is further and father, how to use them .In gamrma how to use.

32.  I don't know use them .

33.  When do me use the one and when do me use the other ?

34.  Are they same or defferent in the meaning and use .Li Hua\\

35.  I used to watch TV or listen music.

36.  My uncle or my aunt used to lead me to the restaurant for breakfast in my childhood.

37.  I used to swim in my childhood.

38.  I used to swim in my childhood, but now I haven't swam for about ten years, I think June is one of the best months in a year .

39.  We use black water pen instead of chalk, then the history of teacher' using chalk is over while a new history begins.

40.  But one of them is used widely in any other city and few in Beijing.