1. With whom is the doctor working?    The doctor is working with the nurse. (super-formal)

2. Whom did the doctor speak to?    The doctor spoke to the nurse. (formal)

3. What did the repairman work on?    The repairman worked on the computer. (informal)

4. Who talked to the customer?       The repairman talked to the customer.

5. To whom did the woman write a letter?    The woman wrote a letter to her friend. (super-formal)

6. Who did the woman write a letter to?    The woman wrote a letter to her friend. (informal)

7. At what did the teacher look?    The teacher looked at the clock. (formal)

8. What did the teacher look at?    The teacher looked at the clock. (informal)

9. Who looked at the clock?       The teacher looked at the clock.

10. What did the robber ask for?    The robber asked for all the money in the cash register. (informal)