57．Mum，I have a sore t_________（喉咙）．

56．Everyone should eat a b_________（均衡的）diet．

55．We all like to sing p_________ songs．

54．I was really busy．I spent the w_________ morning in the office．

53．My daughter has a piano l_________  this afternoon．

52．September is the n_________ month of the year．

51．Every summer I have a long v_________ and I can get a good rest．