31.  they also give off fragrance, they Decorate the house and make the environment clean , they bring happy for us .

32.  I remembered when I was a child, I often went swimming, how happy was it , now I haven't swim for ten years, the starting time I swam was in Beijing ten years ago, Time past fast.

33.  Trees supply raw material for the industry , people can make it into paper, chairs, desks,.......

34.  It is only two months for us to have the exam.

35.  Suddenly, he heard a cry for help.

36.  But I haven't do it for many long time.

37.  They gave their lives for the revolution.

38.  When I had learnt the Lesson One and Lesson Two, I had a text for it this week.

39.  He was always happy to help others and cared for the people more than for himself.

40.  He did a lot of good deeds for the people and the country.