điền who, whom, whose vào chỗ trống

1. ________dictionary is on the table?
2. This is the girl ________Tom fell in love with in Vietnam.
3.I don't know________ did it.
4. This is the doctor ______________helped Sara recover from her illness.
5. These are the kids_________ parents were arrested.
6. __________are you going to ask to the party?
7. To ______will he send the letter?