81.
Because of his ill health, the doctor has advised him not to refrain from smoking.

82.
They have a scheme of rewarding the best of the performers every year.

83.
What happens to all those travellers on the ship was not known?

84.
Making friends is more rewarding than to make enemies.

85.
The moment they saw me, they were delight

86.
He should not had done it.

87.
No sooner do the bells ring than the curtain rose.

88.
The moment the manager came to know fraudulent action of his assistant, he order immediately dismissed him.

89.
The meeting was attended to by all invitees.

90.
If he has to spend five hours in the queue, it was really a wastage.