50．Pop music often comes and goes ______ (easy)．

49．I prefer ______(stay)at home and ______(watch) basketball games

48．I think plants are _______ (beautiful) than animals．

47．一Who taught you to swim?

　　 一I taught ______ (me)．

46．一You can’t ________(move)．It’s dangerous．

45．We used to listen to country music because it was p______.

B)用所给词的适当形式填空。(10分)

44．The Great Pyramid of Khufu is the I _________ one among them

43．W______ water．we can’t live at all．

42．I must ask my father to give up s_______，Because it’s bad for his lungs.

A)根据句意及首字母提示完成句子。

41．Lie down and rest．You will feel b________．