10. Choose the one —— you think you can trust.

11. She asked me —— did it.

12. —— do you think is the best salesman in the firm?

13. —— do you regard as the best salesman in the firm?

14. —— was that —— you were talking to?

15. He is the one —— I was speaking about.

16. —— do we play next week?

17. He is a workman —— can be trusted.

18. He is a workman upon —— you can depend.

19. This letter comes from Robert, —— we all know very well.