41.  Four people are planning a bicycle trip from Beijing to London.

42.  They are trying to collect money for a wild life project.

43.  Because they are trying to collect money for a wild life project .

44.  They are growing here and there, before or behind houses, along roads or around the fields.

45.  They are preparing a plan this term.

46.  We are going to have a picnic in the people's Park.

47.  Trees are anted around the school.

48.  They are swimming , and a lot of them are good at swimming.

49.  I think you are going on studying.

50.  Some flowers are being watered and some ore trees are being planted.