1. The roof of the theatre dropped in on them.

2. I dropped in on George on my way home from school.

3. Drop in on me at any time.

4. I thought I'd drop in on you while I was passing.

5. She spent most of the day dropping in on friends in Edinburgh.

6. Let's drop in on Nick when we're in Bristol, shall we?

7. The Smiths dropped in on some old friends on their vacation trip to New York.

8. She drops in on her parents at least once a week.

9. The roof of the cave dropped in on the miners, trapping them.

10. He just dropped in on his way to the airport.

11. There's a grudge against Tom because he drops in on everyone.

12. Then one agent dropped in on her pals Rick and Rosario Ames, who had returned from a foreign posting.

13. In the late afternoon, slow to go home(sentencedict.com), he dropped in on an elderly doctor friend and played tennis.

14. Drop in on a professor.

15. I'll drop in on you when I have time.

16. Shall we drop in on John?

17. Please drop in on Mary one evening.

18. Please don't drop in on me without telephoning.

19. It's improper to drop in on him so casually.

20. I'll drop in on you on my way home.

21. Would you drop in on us tomorrow evening for a chat?

22. My best friend lives in this neighborhood. Let's drop in on her.

23. Be sure to drop in on me when you can spare a moment.

24. Don't forget to drop in on me if you are in London.

25. Her tears drop a drop in on the phone, he thought it was a radio noise.

25. Sentencedict.com is a sentence dictionary, on which you can find excellent sentences for a large number of words.

26. Brenda : Juno , you can't just drop in on them like that.

27. Oh! I just drop in on him for a chat.

28. I also hope that you could drop in on me at your convenience.

29. Let's drop in on Nick when we're in London, shall we?

30. They lifted a rock only to drop in on their own feet.