71.  They know everything that other students don't, and they can solve any problem which is far too difficult for others.

72.  For the whole half term, the boy always sat in the first row.

73.  As for me, I was used to classify people into different groups to make acquaintance of them.

74.  It was the first day for freshmen to register.

75.  We lined up in a long line on the open-air platform between two colossal buildings, waiting for register .

76.  He dressed up as if he was going to attend a beach party but not for an opening ceremony.

77.  It seemed that a good reason was found for his informal clothing and impolite behavior: A guy from a big city, obsessed in pop music is always arrogant, selfish, cynical and domineering.

78.  "Well, are there any notes left for me? " he looked at us hopefully.

79.  "I'll leave the backdoor open for those who come late, " he murmured.

80.  To our surprise, he was good at lecturing for he used many funny examples.