81.  at 11: 15, we have the last lesson.

82.  at 12:00, we have lunch.

83.  at 3:00, we have the first lesson in afternoon.

84.  At 5:40, school is over.

85.  Usually, I go to bed at 10:20.

86.  she isn't good at talking.

87.  I felt every thing was gook at that time.

88.  she is good at dancing.

89.  At an English party .

90.  Tied it to the tree at the foot of the hill .