21.
Defection is quite common in our present day political life.

22.
The employee was ousted from the office

23.
He could not tolerate his friend rejoicing in his ignominy.

24.
During his stay in Canada, he had quite a few frustrating experiences.

25.
Please sound the Principal about the reaction of the students.

26.
He was not able to unearth his secret to the last.

27.
When the editor refused to publish my first article, I was totally disheartened.

28.
Science has revealed the mysteries of nature to man.

29.
He had a catastrophic defeat.

30.
The oppressive weather made the work difficult for them.