1. What exactly is required of a receptionist？

2. What do you require of me？

3. All I want to require of you is that you should be diligent, punctual, and obedient.

4. All that is required of you is that you observe the rules.

5. I shall do all that is required of me.

6. He required an apology of her.

7. This is all that is required of you.

8. The director required us to work all night.

9. He always requires extra help of me.

10. Silence is required of all the examination candidates.

这些例句展示了"require sb of sth"在不同语境下的用法，包括要求某人做某事、要求某人有某种品质或行为等。希望这些例句能帮助你更好地理解这个短语的用法。