Do you know a good physical therapist which I can go to?
Do you know a good physical therapist to which I can go?
We have just received a delivery of medical supplies for which payment is required.
We have just received a delivery of medical supplies which payment is required for.
Professor Harris is unable to attend the lecture on nutrition to which she was invited last week.
Professor Harris is unable to attend the lecture on nutrition which she was invited to last week.