46. 这个慈善组织帮助为孩子们建设一个更好的世界。

The charity helps .

43. Every year a party (hold) to celebrate the lovely girl's birthday.

42. So far,we (hand) out more than 500 leaflets by ourselves.

41. We should try our best (develop) our own culture.

40. I'm (骄傲) to have such an honest friend like Jim.

39. The (扩散) of diseases must be prevented after a natural disaster.

38. After studying five years in a (医学的) school,he became a doctor.

37. Lots of children lost their home because of (战争) .

36. When the ship was leaving,we saw the people on (在船上) waving.

44. Do you know when WWF (set) up?

45. The doctor says lifestyle changes should be part of the (treat) .