19. We are going to insist on Mary taking a long vacation this year.
20. I have had the pleasure of staying at both your friends houses.
Exercise 85—The Apostrophe
Some of the following sentences are right, and some are wrong. Correct those that are wrong, explaining why they are wrong.
1. The man who's coming this way is Mr. Burton.
2. Whose coat is that?
3. The man who's place you are taking has been with this firm for twenty years.
4. The next one whose to give a report is the treasurer.
5. The next one whose report we must hear is the treasurer.
6. Don't you think it's too early to start?