89.　 I had difficulty in grammar after I entered into the school.

88.　 It is necessary to decide what is worth taking notice.

87.　 I rushed out the house as quickly as I could.

86.　 It was very fine when I got up early on last Sunday morning.

85.　 In a few weeks the story was returned to her.

84.　 In Friday afternoon, some students took part in a speech activity.

83.　 All you can do is encouraging him, show him understanding and offer him advice.

82.　 Hope you great success in your work!

81.　 There used to have a church in front of the school.

80.　 It will cost a rocket a hundred thousand years to reach it.