71.  This isn't easy.

72.  have bravery to speak to people, called on they attened this instructive deed .

73.  They some asked this .

74.  This was alone .

75.  I hope in this surrounding .

76.  This action is bitter and tired.

77.  This action is a instructive.

78.  This is a serious question for our class.

79.  but this is wrong.

80.  This must ask our students .