49．The beef is very c________．It's only 12 Yuan a kilo．

48．Pandas，lions and tigers are all a________．

47．People usually wear sweaters in winter and T-shirts in s________．

46．The street is not clean．It's d________．

45．Tom ________（会）swim．

44．I have ________（四十）English books．

43．Jane is Mr. Green’s ________（女儿）．

42．Look at these ________（照片）．They are Lily's．

41．________（有）is an egg in the box．