61、That was not the first time he( )us. I think it's high time we( )strong actions against him.

51. Facing the board of directors, he didn't deny ( ) breaking the agreement.

80.I’d like to have a ( ) word with his parents.

79.A(n)( ) shape has four straight sides at 90°to each other, two of which are much longer than the other two.

78.The patterns of spoken language are ( ) from those of writing.

77.The boys in the dorm ( ) a coin to decide who would clean the floor.

76.Mercifully,I was able to complete all I had to do within a few days.The underlined part means ( ).

75.Slavery was ( ) in America in the 19th century.

74.The food is good at this hotel,but the ( ) is poor;the waiters don’t seem to be well trained.

73.The speaker was very good at ( ) his ideas during the discussion.

72.Most Chinese people went to work by bike within living ( ).