1. We are sure how/when/where to do it.
2. The boss is uncertain how/when to assign someone else to the project.
3, Tom is careful about who/whom to deal with. He is particular about his
business partners.
4. My friend is careful about what to deal with. She
deals only with what is adequate.
5. We are not always sure how/when/who/whom to refuse
6. You are sometimes uncertain how/what/when/where to accept
7. Are you certain who/whom to assign to this job?
8. Sam is undecided how/when to leave.
9. My friends are sure when/where to go tonight.