Fill in: at, of, in, on

1. What were you looking for
   [ ] particular?
2. You shouldn't make fun
   [ ] Penny. She is very sensitive.
3. I feel really
   [ ] ease in their company.
4. Let's play a joke
   [ ] Mary. It's the last day of school.
5. Mum made her a cake
   [ ] the shape of a clown for her birthday.
6. She cried out
   [ ] terror when she thought she had seen a ghost.